No. 10 garth: brachyuran fauna of the galapagos 451 



343-35. Sulivan Bay, James Island, shore, Dec. 12, 1935, 3 specimens. 

 351-35. South of Black Beach, Charles Island, shore, Dec. 14, 1934, 



2 specimens. 

 354-35. Wreck Bay, Chatham Island, shore, Dec. 15, 1934, 12 speci- 

 mens. 

 358-35. Gardner Bay, Hood Island, shore, Dec. 17, 1934, 8 males, 4 



females. 

 359-35. Osborn Island in Gardner Bay, Hood Island, shore, Dec. 19, 



1934, 21 males, 21 females, 3 young. 

 782-38. Darwin Bay, Tower Island, shore, Jan. 16, 1938, 19 specimens. 

 789-38. South Seymour Island, shore, Jan. 19, 1938, 1 male, 1 female. 

 796-38. Sulivan Bay, James Island, shore, Jan. 21, 1938, 4 males. 

 800-38. Cartago Bay, Albemarle Island, shore, Jan. 22, 1938, 6 speci- 

 mens. 

 803-38. Black Beach, Charles Island, shore, Jan. 23, 1938, 2 males. 

 808-38. Academy Bay, Indefatigable Island, shore, Jan. 25, 1938, 7 

 males, 8 females. 

 Measurements. — Largest specimen, male: length 17.6 mm, width 

 28.6 mm, cheliped 34.0 mm, chela 19.6 mm, dactyl 10.4 mm. 

 Habitat. — High tide level, under small rocks among pebbles. 

 Depth. — Shore to 3 fms. 



Remarks. — L. cooksoni and Mithrax ( Mithraculus ) nodosus Bell, the 

 first a cancroid, the second a spider crab, could be taken plentifully at 

 high tide, when most other species were under several feet of water. 

 While, with the exception of the Pocillopora-dweWmg Trapezias, L. 

 cooksoni exceeded all other Galapagos brachyurans in number of speci- 

 mens obtained, three other species were collected at a greater number of 

 stations. The reason would seem to be that, whereas Teleophrys cristulipes 

 Stimpson, Eriphia granulosa A. Milne Edwards, and Mithrax (Mithracu- 

 lus) nodosus Bell occur in more than one habitat, L. cooksoni is closely 

 restricted to the intertidal zone. 



Genus LOPHOXANTHUS A. Milne Edwards, 1879 



Lophoxanthus lamellipes (Stimpson) 



Plate 77, Fig. 5 



Xantho lamellipes Stimpson, Ann. Lye. Nat. Hist. New York, vol. 7, p. 



205 (77), 1860. 

 Lophoxanthus lamellipes A. Milne Edwards, Crust. Reg. Mex., p. 256, 



pi. 46, figs. 3 and 3a, 1879. Rathbun, Bull. 152, U.S. Nat. Mus., p. 



317, pi. 148, figs. 3 and 4, 1930. Hult, Arkiv for Zoologi, Band 



30A, no. 5, p. 13, 1938. 



