438 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 5 



Material examined (22 specimens from 10 stations). — 

 33-33. Black Beach, Charles Island, shore, Jan. 27, 1933, 1 male. 

 101-33. Darwin Bay, Tower Island, shore, Jan. 26, 1933, 2 males. 

 313-35. Black Beach, Charles Island, shore, Dec. 6, 1934, 1 male. 

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

 pace. 

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

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

 782-38. Darwin Bay, Tower Island, shore, Jan. 16, 1938, 1 male. 

 796-38. Sulivan Bay, James Island, shore, Jan. 21, 1938, 2 males, 8 

 females (the type series, including the female holotype, AHF no. 

 383). 

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

 803-38. Black Beach, Charles Island, shore, Jan. 23, 1938, 1 male, 2 

 females. 

 Measurements. — Largest specimen, female, not holotype : length 25.8 

 mm, width 38.0 mm; male allotype: length 18.6 mm, width 26.9 mm. 



Color in life, — Dark areas on carapace a rich violet carmine, a little 

 more reddish on branchial and posterior areas. Light areas cadmium 

 orange on frontal, gastric, and cardiac regions; branchial and intestinal 

 regions same color but lighter hue. Chela violet carmine on dark areas; 

 fingers very dark seal brown, fading toward tips, which are almost white. 

 Ambulatory legs burnt lake on dark areas and light cadmium orange on 

 light areas. Nail of dactyl amber. Eyestalk pale orange-yellow; eye black- 

 ish brown. (Petersen) 



Habitat. — Under rocks at low tide. 

 Depth. — Shore. 



Remarks. — ^As set forth in the diagnosis of the species, G. hancocki 

 differs from G. labyrtnthicus (Stimpson) (1860) of the Bay of Panama 

 in having the gastric areole independent of the inner protogastric, the 

 orbits joined by an open, transverse furrow, and the vermiculations 

 sparsely pitted. Exceptionally low tides are necessary to uncover this 

 brilliant red and orange xanthid crab, which is found in company with 

 Aethra scruposa scutata Smith and Daldorfia garthi Glassell. 



Genus DAIRA de Haan, 1833 



Daira americana Stimpson 



Plate 82, Figs. 1, 2 

 Daira americana Stimpson, Ann. Lye. Nat. Hist. New York, vol. 7, p. 



212 (84), 1860. Rathbun, Bull. U.S. Nat. Mus., p. 268, pi. 110, 



figs. 1 and 2, 1930. Hult, Arkiv. for Zoologi, Band 30A, no. 5, p. 



12, 1938. Crane, Zoologica, vol. 22, no. 3, p. 70, 1937. 



