BULLETIN OF THE MUSEUM OF COMPARATIVE ZOOLOGY T HARVARD COLLEGE, IN CAMBRIDGE VOL X CAMBRIDGE, MASS., U S A 1882-1883 Reprinted with the permission of the original publisher KRAUS REPRINT CORPORATION New York 1967 Printed in U.S.A CONTENTS Page — Eeports on the Results of Dredging by the United States Coast Survey Steamer "Blake." XVII Report on the Crustacea Parti De(16 Plates) capoda By S I Smith No No — Bibliography to accompany " Selections compiled graphs," Echinodermata No — On Allen By by A Agassiz, from Embryological MonoE L Mark II W Faxon, and 109 A Agassiz a Revision of the Ethmoid Bone in the Mammalia By H (7 Plates) — Reports on the Results of Dredging by the United States Coast Sur" vey Steamer Blake." XX Report on the Ophiuroidea By T Ltman No 165 — Reports on the Results of Dredging by the United States Coast " Blake." XIX Steamer Report on the Fishes By G B Goode Survey and T H Bean No 135 — Reports on the Results of Dredging by the United States Coast " Survey Steamer Blake." XVIII The Stolked Crinoids of the Caribbean Sea By P H Carpentee No (8 Plates) 183 , 227 — Reports on of Dredging, under the Supervision the United States, of Alexander Agassiz, on the East Coast of the Summer of 1S80, by the U S Coast Survey Steamer No the Results during "Blake" Commander E Bartlett, U J S N., Commanding and J E Hilgakd, Supts (Published by peiiuission of Carlile P Patterson U S Coast and Geodetic Survey.) XVII Part Report on the Crustacea The I By Sidney Decapoda I Smith part of the following report relating to the Maci-ura was ready Alphonse Milne-Edwards's Description de quelques for the printer before Crustac'es Macroures provenant des grandes profondeurs de la Mer des XL No 4, 1881) was received, Antilles (Annsdes Sci Nat., Zool., 6°" serie, so that all the references to it have been added subsequently The new and some other recent papers of Milne- Edwai'ds, and in Bates's recent paper on the Penaeidea, are so inoperfectly characterized that in several cases I have found it impossible to determine, with any species in this approximation to certainty, whether or not they are identical with I have endeavored, however, species described in the following pages make the descriptions and figures of the species here described so complete, that subsequent investigators will not labor under a similar to difficulty in regard to them BRACHYURA MAIOIDEA Amathia Agassizii, Plate II Figs sp nov 2, Resembles A Carpentcri Norman (figured by Wyville Thomson, Depths of the Sea, p 175, 1873), but has shorter rostral horns and more numerous spines upon the carapax The carapax VOL X — NO Ip sub-triangular, excluding spines and rostral horns, nearly BULLETIN OF THE four fifths as broad as long, or with the breadth including spines about equal to the length excluding the rostral horns, which are strongly divergent, nearly less than half as long as the rest of the carapax are large, acute, and much more prominent than the supra-orbital spines obtuse post-orbital processes The basal segment of the antenna is armed with two large and nearly equal spines beneath the eye, one near the base, the other The hepatic region projects above the lateral margin in a prominear the straight, and in the adult The tip way from the orbit to the great branchial spine anterior angles of the buccal area project in angular dentiform processes, back of which the prominent margin of the pleural region is armed with two nent spine about a third of the The or three small and unequal spines There are six spines or spiniform tubercles on the gastric region, two median, and each side two slightly smaller which are nearer together than the median There are three median spiniform tubercles on the cardiac region, of which the middle one is much the more prominent, and back of these the posterior margin of the cardiac region lateral, median spine, either side of which the postero-lateral margin is ornamented with a regular series of six or seven minute tubercles The middle of the branchial region projects in a spine directed straight outward and a little upward, which is the largest upon the carapax, and about half on a line between this and the postero-lateral as long as the rostral horns and back of these on the gastric spine there are two spines near together projects in a prominent ; ; posterior part of the region there is a single spine opposite the large cardiac In addition to these dorsal spines of the branchial region there is a spine lateral closely set series of three or four small spines just below the pleural suture and above the base of the cheliped, and a similar but isolated spine below and back of the great branchial spine The entire surface of the cara- pax and of the sternum, and of the exposed parts of the appendages, except the terminal portions of the chelae and of the dactyli of the ambulatory legs, is covered with soft scabrous papillae, and sparsely clothed with short setce The chelipeds are a little longer than the carapax including the rostral horns, and scarcely stouter than the ambulatory legs the chela is nearly as long as and no stouter than the merus, the basal portion subcylindrical, nearly naked and smooth except for minute, scattered papillae, like those on the surface much more scattered the digits are generally except that they are smaller and a little more than half as "long as the basal portion, a little curved, slightly comdentate The ambulapressed, smooth, and with the prehensile edges regularly end of the merus tory legs are all armed with a dentiform spine at tlie distal the first pair are nearly twice as long as the chelipeds, and the succeeding pairs ; ; ; are successively a little shorter third segments of the abdomen of the male are expanded, ami second are each armed with a small median tubercle ^ Station 319, N Lat 32° 25', W Long 77° 42' 30", 262 fath A very much smaller specimen (Plate II fig 3) from Station 317 differs so The second and and tlie first ; much from it might readily be n)istaken for a disan immature male, and diflers in having a apparently the one above described that tinct species It is MUSEUM OF COMPARATIVE ZOOLOGY narrower carapax, with much longer rostral horns and fewer and much longer spines The carapax, excluding the rostral horns and lateral spines, is about two thirds as broad as long ; the rostral horns are as long as the breadth of the carapax excluding the spines, nearly straight, slender, and very acute There are two spines upon the basal segment of the antenna, but the proximal is much smaller than the distal The hepatic spine is slender, and about a fourth as long as the rostral horns There is only one small spine, or one with the rudiment of a second, on the margin of the pleural region back of the anterior angle of the buccal area The two median spines of the gastric region are slender and conspicuous, the posterior much the larger, but there are no lateral spines The middle spine of the cardiac region is as long as the hepatic, and in front of its base there is a rudiment of a second the posterior cardiac spine is slender and very little shorter than the hepatic, but there are no spines or tubercles either side its base The middle spine of the branchial region is slender, and more than half as long as the rostral horns there is a single small spine in place of the two anterior branchial a small posterior branchial is present ; and in place of the series of small spines there are two very minute tubercles The chelipeds and ambulatory legs are nearly as in the other specimen, but the chelae and the dactyli of the ambulatory legs are a little more hairy Station 317, N Lat 31° 57', W Long 78° 18' 35", 333 fath ^ The two specimens give the following measurements ; ; ; Station 319 317 $ Young Sex Length of carapax including rostrum and posterior spine Length of carapax from base of rostrum to tip of pos- 35.2 terior spine 27.5 Length of rostral horns Breadth of carapax, including " " excluding Length 8.5 lateral spines « « of branchial spine cheliped first ambulatory leg " second ^ 13.1 mm 8.4 5.1 27.0 10.5 20.3 5.1 4.5 " " " mm 3.0 37 63 43 13 16 Since the above was written several specimens of this species have been taken Martha's Vineyard by the United States Fish Commission All these speci- oflF mens are intermediate in size between those above described, and show that they are really, as supposed, stages of growth of a single species Hyas coarctatus One young specimen, 71 fath Station 301, N Leach Lat 41° 26' 55", W Lon 66° 3', BULLETIN OF THE Euprognatha rastellifera Stimpson Stimpson, Bull Mus Comp ZooL, H p 123, 1870 A M -Edwards, Crust Region Mexicaine, p 183, PI Mus Comp Zobl., VIIL p 7, Smith, Proc National Mus., Washington, IIL Station N Lat 335 38° 22' 25" 345 40° 346 40° 25' 35" 10' XXXIH fig 2, 1878 ; Bull 1880 p 415, 1881 W Long 73° 33' 40" 15" Fathoms Specimens 89