156 



BULUITIN 97, UNITED STATES NATIONAL MUSEUM. 



Fig. 97. — Pinnixa occidentalis, male holottpb. 

 Abdomen, X 5| ; b, outer maxillh-ed, x 13g. 



Legs thick, granulate; dactyli styliform; third leg reaching 

 by length of dactyl beyond second leg; meriis with siibparallel 



sides and three or 

 more times as long as 

 wide. 



Abdomen of male 

 narrowed a little at 

 first suture, then taper- 

 ing to the sixth seg- 

 ment which is con- 

 stricted at middle. 



Variations. — Cardiac 

 ridge blunter in female 

 than in male, immov- 

 able finger longer, third 

 leg shorter and wider, 

 about 2^ times as long 

 o. as wide. Specimens 

 vary in the proportion 

 of length to width of carapace, in the prominence of cardiac ridge, 

 in the direction of the margins of the second abdominal segment of 

 male, in the length of the immovable finger of tlie male. 



Measurements. — Male holotype, length of carapace 9.5, width 19.5, 

 length of third leg 27 mm. Female paratype (17474), length of cara- 

 pace 10.5, width 20.5, length of third leg, about 24 mm. 



Habitat. — Commensal in burrows of the Gephyrean, EcMurus 

 (Kincaid). 



Range. — From Iliuliuk Harbor, Unalaska, to Alagdalena Bay 

 Lower California; 10 to 238 fathoms. 

 Material examined. — See page 157. 



PINNIXA SAYANA Stimpson. 



Plate 34, figs. 2-4. 



Pinnixa sayana Stijipson, Ann. Lye. Nat. Hist. New York, vol. 7, ISGO, p. 

 230 [lOS] (type-locality, off mouth of Beaufort Harbor, N. C, G fath- 

 oms, sandy mud; type not extant). — Kingsley, Proc. Acad. Nat. Sci. 

 Pliiladelpliia, 1S7S, p. 323 [S].— Smith, Trans. Connecticut Acad, Arts 

 and Sci., vol. 4, ISSO, p. 252. — Fowler, Ann. Ilept. New Jersey State 

 JIus., 1911 (1912), p. 596 (part; not refs. to P. cylindrica except Ver- 

 rill and Smith, part). 



Pinnixa cylimlrica Vekrill, Rept. U. S. Coranir. of Fish and Fisheries for 

 1871-1872 (1873), p. 367 [73] (part, not ref. to Stimpson).— Smith, 

 Kept. U. S. Comrar. of Fish and Fisheries for 1S71-1S72 (1873), p. 

 546 [252], pi. 1, fis. 1 (female); not P. cylindrica (Say, 1818), nor 

 ref. to South Carolina. 



Pinnixa, species, Faxon, Bull. Mus. Comp. Zool., vol. 5, 1879, p. 203, pi. 4, 

 figs. 5-15; pi. 5, figs. 1-7 (early stages). 



