78 CALIFORNIA ACADEMY OF SCIENCES. 



hepatic by a transverse sulcus. Front over one-fourth the width of the 

 carapace, the anterior margin straight and emarginate in the center. 

 Upper margin of the orbit nearly straight, not interrupted by fissures; 

 lower margin with an external fissure and a rounded inner lobe. Ocular 

 peduncles slender and about two-thirds as long as the width of the front 

 and furnished anteriorly with two converging rows of long hairs. Autero- 

 lateral margin strongly curved and furnished with three teeth (including 

 the postorbital), the first two of which are thin-edged and lobate, the sec- 

 ond one broadly rounded; the last tooth is acute. Buccal area widened in 

 front. External maxillipeds diverging anteriorly, the merus distally trun- 

 cated, with the antero-external angle rounded and not produced. Chelipeds 

 unequal; merus short, thick, trigonous, with the edges granulated, and 

 furnished with a prominent tooth at the supero-distal angle; carpus with 

 a spine at the antero-internal angle and a short, longitudinal, granulated 

 ridge at the distal end of the outer surface; hands wide, much compressed, 

 the outer surface nearly smooth but granulated near the upper and lower 

 margins; upper edge acute and sharply granulated; fingers ridged, the 

 pollex not deflexed. Legs smooth, glossy, pubescent; dactyls slender 

 with strongly pubescent margins, the last pair and to a less extent the 

 preceding pair upturned. First segment of the abdomen in the male 

 short and wide, but much narrower than the last thoracic sternum; second 

 segment a little longer but markedly narrower than the first; third seg- 

 ment as wide proximally as the first, the sides converging rapidly to the 

 coalesced fourth segment; remaining segments tapering gradually to the 

 rounded extremity. 



Length of carapace 16 mm. 



Width of carapace 21mm. 



San Pedro, California. Lives in holes on muddy 

 beaches. 



Quite closely allied to carolinensis St. from the Atlan- 

 tic coast, but is distinguished by having three instead 

 of five antero-lateral teeth, and by its longer eye- 

 peduncles. From granulimanus Rath, it differs in the 

 number of antero-lateral teeth, the smoother hands, and 

 in having the antero-external angle of the merus rounded 

 and not produced. 



Family GRAPSID.E. 



Carapace depressed or moderately convex, more or less quadrilateral, the 

 lateral margins straight or slightly arcuate. Front usually broad, never 

 very narrow. Orbits and eye-stalks of moderate size. Palp of the 



