NO. 2 WALTON : THE GENUS PYLOPAGURUS 1 5 1 



Specimens were taken by Hancock Expeditions at Isla Partida at 

 station 559-36 and at San Francisquito Bay at station 634-36, both in the 

 Gulf of California. The depths were 45 and 125 fathoms, respectively. 



Remarks: One specimen was taken in a coiled gastropod shell. 



Pylopagurus spinicarpus Glassell 



1938 Pylopagurus spinicarpus Glassell, Allan Hancock Pac. Exped. 

 5 (1) p. 1. 



Type: Male holotype, U.S.N.M. catalogue number 75432, and 

 female paratype, from Puerto Refugio, Angel de la Guardia Island, 

 Gulf of California, collected 4 March 1936 in 65 fathoms. 



Description: Chelipeds dissimilar and unequal, the right much 

 larger; merus trigonal, upper distal portion rounded, slightly setose, 

 medial and inferior margins entire; carpus widening distally, medial 

 margin with two forward-curving medial teeth separated from larger, 

 distal tooth by deep rounded sinus, superior surface smooth with few 

 large scattered setae, medial surface greatly contorted; manus longi- 

 tudinally and transversely convex, medial margin of palm a serrate 

 ridge, lateral margin a low granulate ridge; both margins continued on 

 to fingers ; fingers and palm equal in length. 



Minor cheliped reaching nearly to middle of palm of major cheliped, 

 merus compressed, smooth, lightly setose ; carpus slightly shorter, widen- 

 ing distally with scattered coarse setae, outer margin with one medial 

 spine, anterior margin with two spines ; hand long, outer margin a low- 

 toothed ridge, inner margin obsolete, surface smooth except for median 

 ridge on palm extending some distance onto pollex. 



Precervical portion of carapace as long as wide, transversely convex, 

 naked, polished; median point obtuse, armed with sharp, depressed 

 spinule, lateral points as long as median, armed with spinules; post- 

 cervical portion naked, membranous. 



Eyestalks long, equal to width of carapace, cylindrical, constricted in 

 middle, with several tufts of coarse setae on dorsal and medial surfaces, 

 cornea dilated; ophthalmic scales bluntly pointed, margins entire with 

 fringe of radiating setae, subterminal spines prominent and sharp. 



Antennal acicle slender, outward-curving, acute, reaching base of 

 cornea; peduncle when extended exceeds length of eyes by one third the 

 length of cylindrical terminal article ; flagellum setose. 



Antennular peduncle exceeding eyes by length of terminal article; 

 superior flagellum of about 17 annulations, densely setose beneath; in- 

 ferior flagellum about one half the length of superior flagellum. 



