120 BULLETIN OF THE 



Collodes trispinosus nov. sp. 



Carapax ovate-triangular, hah - )', and everywhere covered with small 

 granulated tubercles, except on the front and the anterior portion of the 

 gastric region. There is an erect, capitate spine on the gastric, one on the 

 cardiac region, and one of equal size on the basal joint of the abdomen. 

 Rostrum with two minute horns. Four minute spines on the basal joint 

 of the antennae, the anterior one of which is placed nearly on a level 

 with the horns of the rostrum. Ambulatory feet long, and provided with 

 long stiff hairs ; hairs of the penult joint below straight and above hook- 

 like and often serrated on the inner side near the tip. Dactyli of the am- 

 bulatory feet about as long as the penult joint. 



In the male of this species the carapax is somewhat more elongated and 

 depressed than in the female ; the hands are of moderate size only, and 

 much curved inward ; fingers nearly as long as palm and gaping, with a 

 tooth inside on the middle of the thumb. Abdomen of the male elongate 

 triangular ; intromittent organs nearly straight, simple, reaching nearly to 

 the extremity of the abdomen. 



All the specimens examined were covered with a thick coating of mud, 

 held by the setae. 



The dimensions of a female specimen are : Length of the carapax, 0.41 ; 

 breadth, 0.32 inch. 



The only species hitherto known of this genus is the C. granosus of the 

 west coast of North America, described by me in " Notes on North Ameri- 

 can Crustacea," page 66 (Annals of the New York Lyceum of Natural 

 History, Vol. VII, p. 194), from which the species under consideration 

 differs in its more elongated carapax, which is more completely covered 

 with granulated tubercles, and in the somewhat greater length of (he 

 rostral horns and the spines on the basal joint of the antennae. It is 

 proper to state that of C. granosus only a single (female) specimen is as 

 yet known. 



The species occurred as follows : — 



Off the Quicksands, January 23, 1869. Cast No. 1. 34 fathoms. 

 OffCarysfort Reef, March 21, 1869. Cast No. 8. 35 

 Off Carysfort Reef, March 21, 1860. Cast No. 7. 40 

 Off French Reef, April 3, 1869. Cast No. 4. 50 



Collodes nudus nov. sp 

 Allied to C. granosus and C. trispinosus, having three spines on the back 

 similar in shape and position to those of those species. It differs from 

 them, however, in its naked carapax and feet, and in the less numer- 

 ous and prominent granulated tubercles of the dorsal surface. The carapax 

 is also much broader anteriorly. 



