434 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 5 



Type locality. — Off Hood Island, Galapagos Islands. 



Type.—\]?>^M No. 21578. 



Range. — Known only from the type locality. 



Atlantic analogue. — A. bifrons Rathbun. 



Diagnosis. — Carapace narrow, covered with bead granules; margin 

 cut into 4 well-defined teeth. A small species. 



Material examined. — 

 201-34. Off Gardner Bay, Hood Island, 25-35 fms, Jan. 31, 1934, 1 

 young (photographed). 



Measurements. — Length 4.3 mm, width 5.8 mm. 



Habitat. — "Mostly rock." (Probably with sand patches.) 



Depth. — 20-35 fms. 



Remarks. — Apparently this distinctive species is destined to remain a 

 great rarity in collections, as repeated dredging over the type locality has 

 yielded but one specimen in five expeditions, the first since the type. This 

 specimen has been compared with the holotype (USNM No. 21578) and 

 is identical in size and appearance. The pearly granules of the carapace 

 and cheliped distinguish it from the remaining Galapagos members of the 

 genus. 



Actaea sulcata Stimpson 

 Plate 77, Fig. 1 



Actaea sulcata Stimpson, Ann. Lye. Nat. Hist. New York, vol. 7, p. 203 

 (75), 1860. Rathbun, Bull. 152, U.S. Nat. Mus., p. 259, pi. 105, 

 figs. 3 and 4, 1930. Finnegan, Journ. Linn. Soc. London, vol. 37, 

 p. 632, 1931. Crane, Zoologica, vol. 22, no. 3, p. 69, 1937. 

 Type locality. — Cape San Lucas, Lower California. 

 Type. — Not extant. 



Range. — From Arena Bank, Gulf of California (Crane), to Gorgona 

 Island, Colombia (Crossland) ; 2^-15 fms. 



Atlantic analogue. — A. rufopunctata nodosa Stimpson. 

 Diagnosis. — Carapace covered with raised nodules, deeply separated. 

 Material examined (44 specimens from 22 stations). — 

 28-33. Gardner Bay, Hood Island, 2 fms, Jan. 25, 1933, 1 young. 

 30-33. Gardner Bay, Hood Island, shore, Jan. 26, 1933, 1 male, 1 



1 female, 2 young. 

 48-33. Barrington Island, shore, Feb. 2, 1933, 1 female, 1 young. 

 56-33. Flamingo Bay, Charles Island, shore, Feb. 5, 1933, 5 specimens. 

 59-33. Off Cormorant Bay, Charles Island, 13 fms, Feb. 6, 1933, 1 

 male, 2 young. 



