36 CALIFORNIA ACADEMY OF SCIENCES. 



about half its length, the horns narrow, divergent, and slightly upturned 

 at the tip. No preorbital tooth; postorbital small. Antero-lateral margin 

 entire. Basal autenual joint considerably longer than wide and devoid of 

 teeth with the exception of the one at the antero-external angle, which is 

 plainly visible from above; tip of the peduncle reaching but beyond the 

 apex of the notch between the rostral horns, not nearly reaching the tip 

 of the rostrum as in pacifica; flagellum rather long. Merus of the maxil- 

 lipeds distally truncated. Chelipeds unarmed; merus not nearly reaching 

 the tip of the rostrum; hand oblong, inflated, the edges obtuse and paral- 

 lel; fingers widely gaping, a tubercle on the inner margin of the dactyl 

 near the base. Ambulatory legs compressed, pubescent, the margins fur- 

 nished with a thick fringe of stiff setae; dactyls sharply curved at their 

 sharp, corneous tips. 

 Length 12 mm.; width 8 mm.; length of first ambulatory leg 12 mm. 



Described from a single male specimen from Magda- 

 lena Bay, Lower California, preserved in the museum 

 of the California Academy of Sciences. This specimen 

 is, I believe, one that is mentioned by Lockington, 1. c., 

 p. 67. 



San Diego (Lockington), Magdalena Bay, Lower Cali- 

 fornia (Lockington)! Santa Catalina Island! 



Pelia pacifica Milne- Edw. 



Pelia pacifica A. MILXE-EDWABDS, Miss. Sci. au Mex., Vol. I, Pt. V, 1875, 

 p. 73, PI. XVI, fig. 3. K.VTHB0N M., Proc. U. S. Nat. Mus., Vol. XVI, 

 1894, p. 90; and Vol. XXI, 1898, p. 573. 



Near mutica, but having a shorter and wider carapace with the promi- 

 nences on the gastric and cardiac regions more pronounced. Kostrum 

 short and stout. Basal auteunal joint shorter and wider than in mutica. 



Length of carapace 9 mm.; width 7 mm. 



Bay of Panama (M.-Edw.); Gulf of California, Mag- 

 dalena Bay, Lower California! San Diego, Santa Cata- 

 lina Island (Miss Rathbun). 



Genus Herbstia Milne-Edw. 



Carapace broadly triangular or subpyriform, tuberculated or spinose. 

 Rostrum short, the horns acute, vertically compressed, and dilated at the 

 base. Orbits shallow, with or without a preorbital spine. Eyes short and 



