132 



BULLETIN 97, UNITED STATES NATIONAL MUSEUM. 



tudinal row of setiferous granules at lower third ; above this the sur- 

 face is granulate and setose, below it the surface is smooth and bare 

 down to a row of tubercles on lower edge; fingers slender, closing 

 together, outer margins granulate and setose, prehensile margins very 

 finely denticulate. 



First and second legs narrow, with 

 straight dactyli and not very un- 

 equal; third and fourth legs of 

 stouter build, dactyli short, very 

 stout, short-pointed ; merus of third 

 with anterior border convex and pu- 

 bescent, posterior border tuberciilate ; 

 fourth leg very small, reaching to 

 end of merus of third. 



Between second and third seg- 

 ments of abdomen there is a row of 

 hairs which lie flat on the second 

 segment ; some of third to sixth seg- 

 ments usually partly fused; end of 

 abdomen from middle of sixth seg- 

 ment suddenly enlarged, end seg- 

 ment semicircular. 



Sexual variation. Female larger, 

 carapace more swollen, frontal region more inclined, dorsal and 

 antero-lateral ridges weaker, posterior margin wider, fingers longer, 

 appendages more setose. 



Color. Violet; abdomen of male ash-colored, of female golden- 

 yellow (Milne Edwards and Lucas). 



FIG. 74. PlXXIXA TKAXSVERSALIS, 



OUTER MAXILLIPED OF FEMALE 



(4044G), X 1CJ. 



FIG. 75. PlXNIXA THAXSVERSALIS. a, ABDOMEN 



OF MALE, ENLARGED; b, RICUT CHELIIED, EN- 

 LARGED. (AFTER FAXON.) 



FlG. 7G. PlNXIXA TUANSVERSALIS, 



ADDOMEX AXD STERNUM OF MALE, 

 ENLARGED. (AFTER MlLXE ED- 

 WAUDS AXD LUCAS.) 



Measurements. Male (20G25), length of carapace 4.7, width of 

 same 9.7 mm. Female (40446), length of carapace 8, width of same 

 1G.5 mm. 



Habitat. In tube of annelid resembling Chaetopterus (Coker). 



