CALIFORNIA STALK-EYED CRUSTACEA. 93 



Pinnixa faba Dana.j 



Pinnitheres faba Dana, Proc. Acad. Nat. Sci. Phila., 1851, p. 248; Crust. 

 U. S. Expl. Expd., Part I, 1852, p. 381, PI. XXIV, fig. 4. Bate, in 

 Lord's Nat. iu Vancouver's Island, Vol. II, 1866, p. 271. 



Pinnixa faba Stimpson, Journ. Bost. Soc. Nat. Hist., Vol. VI, 1857, p. 

 470. Cooper, Kep. Expl. and Surv. Pac. Ocean, Vol. XII, Book 2, 

 1860, p. 387. Haswell, Cat. Australian Crust., p. 113. Newcombe, 

 Bull. Nat. Hist. Soc. Brit. Col., 1893, p. 25. 



Carapace strongly convex, both longitudinally and transversely; no 

 transverse ridge behind the gastric area. Antero-lateral margins marked 

 hy a low ridge which disappears near the orbits.' Front slightly project- 

 ing and divided into two rounded lobes. Antennules transversely plicated. 

 Antennae much longer than the width of the front. The penultimate 

 joint of the palp of the maxillipeds projects considerably beyond the ter- 

 minal one; both joints are more or less sulcate on the outer surface. 

 Hands of the chelipeds fl^attened, widest just behind the articulation of 

 the dactyl, and more or less pubescent on the inner side between the 

 fingers; fingers gaping at the base; dactyl curved, acute and furnished 

 with a tooth near the middle of the inner margin; and (generally) a row 

 of hairs on the upper edge; pollex short, nearly straight, and obliquely 

 truncated at the tip. First pair of ambulatory legs shorter than the sec- 

 ond; dactyls subcorneal from a stout base and slightly curve,d; third pair 

 longer and stouter than the second, the dactyl similar in form though 

 stouter; last pair larger than in most of the species, the propodus reach- 

 ing beyond the merus of the preceding pair; dactyls more slender than 

 those of the third pair. Upper and lower edges of the ambulatory legs 

 (generally) quite strongly pubescent. Abdomen of the male tapering 

 evenly to the penultimate joint, which tapers more rapidly than the pre- 

 ceding ones; last joint about as long as wide and rounded at the tip. 



Vancouver's Island (Smith); Queen Charlotte Island 

 (Newcombe); Puget Sound (Dana); Shoalwater Bay 

 (Cooper); San Pedro, Calif.! 



Dr. H. P. Johnson found several specimens of this 

 species in the cloaca of a large species of Holothurian, 

 Liosoma arenata St. It more commonly occurs in the 

 shells of large bivalved molluscs. 



