THE CANCROID CRABS OF AMERICA 483 



K'. Margins of carapace long spined. 



LK Frontal lobes edged with 5 or 

 more denticles or spinules. 

 Lateral spines more or less 



compound caribaeus, p. 491. 



L^. Frontal lobes edged with 3 spines. 

 Lateral spines simple. 



townsendi, p. 504. 

 K*. Lateral and orbital margins iirmed 

 with spiniform teeth. Frontal mar- 

 gin spinulous depressus, p. 506. 



F^. Hair covering the whole carapace and forming a thick 

 coat concealing the surface beneath. 

 G'. Chelipeds spinous above. A transverse row of 



long hairs across front floridanus, p. 507. 



G^. Chelipeds not spinous above. Carapace tuber- 



culate. 



W. Felt-like covering of carapace forming well 



defined areoles, deeply separated from one 



another. Half or less than half of outer 



surface of major palm bare and smooth. 



holosericus, p. 519. 

 H». Felt-Uke covering of carapace not forming 

 well defined, deeply separated areolets. 

 J'. Anterior half of carapace and upper surface 

 of chelipeds dotted with bead-Hke tuber- 

 cles. Upper margin of orbit furnished 

 with truncate spines. -pannosus, p. 514. 

 J*. Tubercles of carapace not numerous nor 

 prominent. Upper margin of orbit not 



spinous lacteus, p. 511. 



E^. Major palm with outer surface rough all over or nearly so. 

 F'. Carapace covered with a dense pubescence in which 

 are set small tubercles regularly placed. 

 GK Hairy covering short and trim. A small bare, 

 smooth spot on major palm at base of immovable 



finger limosus, p. 518. 



G^. Hairy covering short; long tubular hairs inter- 

 spersed, numerous on legs and chelipeds giving 

 them a ragged appearance. Red bead tubercles 

 showing on carapace, chelipeds and legs. 



gemmatus, p. 513. 

 F^. Carapace pubescent and hairy but not so densely as to 

 conceal the surface beneath. 

 G'. Carapace and chelipeds spinous. Carapace nar- 

 now, about one-fourth wider than long; antero- 

 lateral margin short. Spines of carpus of am- 

 bulatory legs normal to the article. 



diomedeae, p. 501. 

 G^. Carapace and cheUpeds granulate, without spines. 



pygmaeus, p. 515. 



D*. Palms naked nudimanus, p. 523. 



C*. Ambulatory legs very long and slender, the longest ones twice as long 

 as carapace. 



