THE GKAPSOID CBABS OF AMERICA. 139 



ing, tips hooked, two rows of sharp granules above dactylus, a few 

 small teeth on prehensile edges. 



Dactyls of ambulatory legs straight or nearly so, first two slender, 

 last two stout. First leg narrower than second, reaching middle of 

 dactylus of second ; second leg to middle of propodus of third ; third 

 very wide, lower margins denticulate, merus and propodus margi- 

 nate above, merus 1 times as long as wide, propodus as wide as its 

 anterior length, tapering rapidly toward dactylus; fourth leg not 

 exceeding merus of third, wide in proportion. 



A line of hair at distal end of second segment of abdomen is con- 

 tinued along sternum. 



Sexual variation. In male, carapace narrower, side wall relatively 

 steeper, shoulder more prominent; palm wider proportionally, fixed 

 finger & little shorter, fingers gape slightly. Abdomen wide at third 

 segment whence it tapers unevenly to the last segment, which is 

 wider than the sixth, truncate at extremity, strongly arched at sides, 

 and fringed with long hair. 



Measurements. Male (49249), length of carapace 2.4, width of 

 same 4.4 mm. Female (6996), length of carapace 3.5, width of same 

 8 mm. 



Range. Florida at Marco and Sarasota Bay. 



Material examined. 



Marco, Florida; 1885; Henry Hemphill; 3 females ovig. (1 is 

 holotype (6996). 



Sarasota Bay, Florida: Union College collection (1015) ; 1 male, 

 1 female ovig., labeled P. cylindrica by Kingsley (49249). Union 

 College- collection (1039) ; 1 female ovig., labeled P. cylindrica by 

 Kingsley (49250). 



PINNIXA RETINENS, 1 new species. 



Plate 41, figs. 1 and 2. 



Type-locality. Chesapeake Bay; off Poplar Island, Maryland; 

 20 fathoms; soft bottom; Apr. 25, 1916; station 8528; Fish Hawk; 

 male holotype; Cat. No. 50167, U.S.N.M. 



Diagnosis. No cardiac ridge. Fingers slender, not deflexed. A 

 strong, curved spine on ischium of third leg. 



Description of male. Carapace nearly twice as wide as long, 

 nearly flat except toward margins, where it slopes gradually down- 

 ward; regions indicated; lateral margin marked by a sharp, granu- 

 lated ridge, up to the subhepatic sulcus; no cardiac ridge; a groove 

 subparallel to, and a little in front of, the posterior margin. 



Dactylus of outer maxilliped obliquely spatuliforrn and attached 

 to the middle of the inner margin of the propodus. 



1 Rctincns, holding fast, in allusion to the probable use of the ischial spine. 



