440 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 5 



168-34. Academy Bay, Indefatigable Island, shore, Jan. 20, 1934, 2 



males. 

 194-34. Post Office Bay, Charles Island, coral from Onslow Island 



crater, Jan. 27, 1934, 6 males, 3 females. 

 202-34. Gardner Bay, Hood Island, shore, Jan. 31, 1934, 6 males, 3 



females. 

 313-35. Black Beach, Charles Island, shore, Dec. 6, 1935, 8 females, 



2 young. 

 315-35. Opposite Gordon Rocks, Indefatigable Island, coral, Dec. 8, 



1934, 6 males, 2 females, 12 young. 

 333-35. James Bay, James Island, shore, Dec. 11, 1934, 1 male, 7 



females. 

 343-35. Sulivan Bay, James Island, shore, Dec. 12, 1934, 1 male, 2 



young. 

 350-35. South Seymour Island, shore, Dec. 13, 1934, 1 male, 1 female. 

 357-35. Gardner Bay, Hood Island, coral, Dec. 17, 1934, 3 males, 4 



females, 8 young. 

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



1934, 9 males, 19 females. 

 784-38. Darwin Bay, Tower Island, shore, Jan. 17, 1938, 10 males, 



10 females, 6 young. 

 789-38. South Seymour Island, shore, Jan. 19, 1938, 8 males, 6 females. 

 796-38. Sulivan Bay, James Island, shore, Jan. 21, 1938, 2 males, 4 



females (1 ovig.). 

 800-38. Cartago Bay, Albemarle Island, shore, Jan. 22, 1938, 1 female. 

 804-38. Onslow Island, near Charles Island, coral, Jan. 23, 1938, 2 

 young. 



-38. Academy Bay, Indefatigable Island, no date, 1938, Karl 

 Kiibler, collector, 1 young. 

 Measurements. — A large female: length 31.0 mm, width 44.0 mm, 

 cheliped 38.0 mm, chela 23.7 mm, dactyl 12.0 mm. 



Color in life. — Uniform rich chocolate brown. Eyes and under side 

 prune purple. (Garth) 



Habitat. — Under rocks and in Pocillopora coral. 

 Depth. — Shore to 3 fms. 



Remarks. — In view of the fact that D. americana was the first brachy- 

 uran encountered by the Hancock Expedition of 1933 and one of the most 

 abundant thereafter, it seemed incredible that it had not previously been 

 taken in the Galapagos Islands. The ship's crew, with a little instruction, 

 could be relied upon to bring back this species among the half dozen which 

 they learned to recognize by sight, aided no doubt by its chocolate-brown 

 color and the distinctive rounded nodules of the carapace. 



