76 Bulletin, Vanderhilt Marine Museum, Vol. II 



Synonymy. — Anasimus latus Rathbun, Proc. U. S. Nat. Mus., vol. 17, 

 p. 58, 1894 ; Bull. Lab. Nat. Hist. State Univ. Iowa, vol. 4, p. 254, 

 pi. 2, figs. 2 and 5, 1898 j Bull. 129, U. S. Nat. Mus., p. 65, pi. 214, 

 1925. 



Genus : COLLODES Stimpson. 

 Collodes granosus Stimpson. 



Plate 21, figs. A and B. 



Name : Pearly spider crab. 



Diagnostic chaeacters : Small. Male with six dorsal tubercles, i.e., 

 one on the median gastric, one on the cardiac, a submedian pair on the 

 intestinal region, and one on the apex of each branchial region. Fe- 

 male usually with only three median tubercles, i.e., gastric, cardiac 

 and one intestinal. Rostrum subtriangulate, bifid. Male chelipeds 

 elongate, swollen, fingers usually with gape. Female chelipeds small, 

 fingers not gaping. Carapace and ventral surface in both sexes coarsely 

 granulate. 



Type : The type of this species was taken at Cape St. Lucas, Lower 

 California, and was deposited in the ''Museum of the Smithsonian 

 Institution," but like many of their crustacean types, it is no longer 

 extant. 



Distribution : This species has hitherto been known from only five 

 stations in the Gulf of Lower California, La Paz, San Jose Island, and 

 at Cape St. Lucas, in shallow water. The ''Ara" material substan- 

 tially extends the southern range of the species, being its first record 

 from Perlas Islands. 



Material examined : Three males and two egg-laden females from 

 Perlas Islands, February 19, 1928. One male from Puntas Arenas, 

 Costa Rica, February 14, 1928. 



Habits: This is one of the rare, minute spider crabs of tropical 

 western America. The specimens taken by Mr. Vanderbilt are heavily 

 camouflaged in seaweed and sponges and coated with sediment, mak- 

 ing the animal resemble a nodule of mud. 



Color: The "Ara" specimens are a rich cream yellow; the eyes 

 shining black. 



