PYLOPAGURUS LONGIMANUS. 61 



PYLOPAGURUS A. M. Edw. et Bouv. 



Bull. Soc. Philomath, de Paris, 8'^""= Sei., III. 108, 1891 (type species mentioned — Eupaffurus 

 discoidalis A. M. Edw.) ; Mem. Mus. Comp. Zool., Vol. XIV., No. 3, p. 74, 1893 (geuus described). 



Eight species of Pylopagnrus have hitherto been described, all of them 

 restricted to the West Indian region with the exception of one species, 

 P. iingulatus (Studer), which has been found also near the Cape of Good 

 Hope. They inhabit moderate depths (20-508 fathoms). Three species 

 were secured during the "Albatross" Expedition, all of them closely aUied 

 to West Indian forms. 



Tylopagiirus longimanus Fax. 

 Plate XII., Fiij. 1-r. 



Bull. Mus Comp. Zool., XXIV. 168, 1893. 



Carapace smooth, naked, polished, very convex from side to side ; ros- 

 trum short, triangular, subacute, advanced further than the rounded lateral 

 angles. Abdomen longer than the cephalo-thorax. Eye-stalks equal in 

 length to the fii'st two segments of the antennular peduncle, smooth, pol- 

 ished, with a few setaj on the dorsal face. Ojilithalmic segment uncovered. 

 Ophthalmic scales separated by a considerable interval, triangular, their tips 

 split in a horizontal plane so that they end in two acute teeth, one above 

 the other, the lower tooth the longer. Last segment of the antennular 

 peduncle very long and slender (much longer than the eye-stalk), with long 

 setaB on its lower side. Second segment of antennal peduncle armed with a 

 small and acute median tooth at the distal end of the dorsal face, and pro- 

 longed into a short and broad triangular external process ; third segment 

 robust, reaching nearly to the end of the eye-stalk ; distal segment long and 

 slender ; flagellum setose, reaching to the distal end of the carpus of the 

 larger cheliped when this appendage is extended ; antennal acicle reaching 

 the end of the eye, curved upward, and furnished with many long setJB, 

 especially on the superior border and near the tip. The right cheliped 

 attains an enormous size, much exceeding the whole body in length ; the 

 outer face of the merus is nearly smooth, but the lower and inner faces of 

 this segment are granulated ; the carpus is very large, equalling in length 

 all the preceding segments combined ; it broadens gradually from the proxi- 

 mal to the distal end, is subquadrate in shape, the height equalling the 



