THE GEAPSOID CRABS OF AMERICA. 93 



and dactylus of right second leg longer than in left leg, but not as 

 long as in mature female. Abdomen not wider than in male, but 

 margins slightly convex, sixth segment not contracted, extremity 

 rounded. This form may be a distinct species. 



Measurements. — Female, Pearl Islands, length of carapace 11.8, 

 width of same 13.4 mm. Male, Pearl Islands, length of carapace 5.5, 

 width of same 6.1 mm. 



Habitat. — Lives in pearl oyster {Margaritophora firnbriata 

 Dunker). 



Range. — La Paz, Lower California, Mexico (Smith) ; Muleje Bay, 

 Gulf of California (Holmes) ; Pearl Islands, Bay of Panama 

 (Smith). 



PINNOTHERES RETICULATUS, new species. 



Plate 21, figs. 1 and 2. 



Type-locality. — Gulf of California: off San Josef Island, Lower 

 California, Mexico; lat. 25° 02' 15'' K; long. 110° 43' 30" W.; 17 

 fathoms; S. Sh.; March 17, 1889; station 3002, Albatross; 1 female 

 (18217). 



Diagnosis. — Female suborbicular, longer than broad; hands reticu- 

 lated. Second leg longest, fourth dactylus longest, second and third 

 propodus swollen at base. 



Description of female. — Carapace suborbicular, longer than broad, 

 soft, papyraceous, slightly convex; gastric region bluntly elevated 

 on median line, and separated by a 

 broad depression from the branchial 

 region; 4 pits form a quadrilateral in 

 this depression; a lunate depression 

 near hepatic margin. Front slightly 

 convex in dorsal view, scarcely pro- 

 jecting beyond curve of antero-lateral fig. 46.— pinnotheres reticulatds. 

 margin. Eyes orbicular, large, visi- o^™k maxilliped of female holo- 

 ble dorsally, corneae of moderate size. 



First two articles of palpus of outer maxilliped short and broad; 

 dactylus curved and with subparallel margins and attached near 

 proximal end of propodus which article it does not overreach. 



Chelipeds and legs short-pubescent, chelipeds long-hairy inside, 

 small; manus subcylindrical, increasing a little distally, lower mar- 

 gin straight, upper slightly convex; pubescence arranged in a reticu- 

 lating pattern, the interstices of which are smooth and of a darker 

 color (in alcohol) ; fingers stout, points hooked toward each other, 

 prehensile edges each armed with two teeth, of which the one near 

 base of dactyl is the largest. 



