86 CALIFORNIA ACADEMY OF SCIENCES. 



Genus Pinnotheres Latr. 



Carapace smooth, subglobose, more or less membranaceous and scarcely 

 wider thau loug. Orbits small, nearly circular. Front narrow, with the 

 anterior margin nearly straight. Auteunules transverse. Maxillipeds 

 oblique, the merus large, usually curved, the last joint of the palp joined 

 to the inner margin of the preceding one. Ambulatory legs subequal and 

 of moderate length. 



Pinnotheres nudus Holmes. 



Pinnotheres nudus HOLMES, Proc. Cal. Acad. Sci., 2d Ser., Vol. IV, 1895, 

 p. 563, figs. 1-5. 



Carapace a little broader than long, subquadrate to orbicular in outline, 

 curving downwards towards all the margins; surface smooth and naked. 

 Front rounded, deflexed, not protruding. Orbits ovate. Antennules 

 oblique. Maxillipeds oblique, neatly fitting the buccal area; merus broad, 

 smooth, subquadrate, the outer margin produced into a broadly rounded, 

 laminate expansion; penultimate joint oblong and distally rounded; last 

 joint spatulate, articulated near the base of, and extending somewhat 

 beyond the preceding one. Chelipeds rounded, smooth, devoid of spines 

 or teeth; hands narrow, rather thick; fingers subconical, subequal to the 

 palm. The three anterior pairs of ambulatory legs subequal; dactyls 

 nearly straight; those of the fourth pair longer and mpre slender than the 

 others. 



Length, 20 mm.; breadth, 24 mm. 



Santa Cruz (Dr. Anderson's Coll.)! Monterey! 

 Pinnotheres pugettensis, sp. nov. 



Carapace soft, smooth, subpentagonal. Front triangular, acute, curved 

 downwards, scarcely protruding beyond the general contour of the cara- 

 pace. Orbits nearly circular. Antennae shorter than one-half the width 

 of the front. Maxillipeds very oblique, strongly pubescent; merus nar- 

 rower than in nudus, the outer margin convex; penultimate joint broad, 

 subquadrate, distally truncated, last joint minute, joined slightly in ad- 

 vance of the middle of the preceding one but scarcely reaching beyond 

 the tip. Chelipeds smooth; merus short, the upper margin furnished 

 with long hairs; hands narrow, elongated, rounded, smooth, the dactyls 

 and inner side of the palm short, pubescent; fingers subcyliudrical, nearly 

 straight, a little shorter than the palm, the tips strongly hooked, dactyl 

 with a low tooth near the base of the inner margin. Ambulatory legs 

 slender, increasing slightly in length posteriorly; propodi hairy above and 



