No. 10 GARTH : BRACK YURAN FAUNA OF THE GALAPAGOS 365 



155-34. Off Tagus Cove, Albemarle Island, 50-60 fms, Jan. 15, 1934, 



1 male (illustrated in part) (AHF no. 34046). 

 157-34. Tagus Cove, Albemarle Island, 10-18 fms, Jan. 15, 1934, 1 



young female (USNM No. 69213). 

 190-34. Lat. 0° 55' S, Long. 90° 30' W, 58-60 fms, Jan. 26, 1934, 1 

 female (USNM No. 69214), 1 female, 1 carapace (AHF no. 

 34047). 

 325-35. Outside of Tagus Cove, Albemarle Island, 80 fms, Dec. 10, 

 1934, 1 male (USNM). 

 Measurements. — Female: length 20.6 mm, width 24.7 mm. 

 Habitat. — Sand and shell, sand and nullipore; coral, nullipore and 

 rock. 



Depth.— \0-\5Q fms. 



Remarks. — O. galapagensis is not the true Pacific analogue of the 

 Atlantic O. antillensis Rathbun (1916) as given by Rathbun (1937, p. 

 250). Another and better analogue has been proposed by the vt^riter 

 (1940) in O. sona Garth from the Panamanian mainland. 



Osachila levis Rathbun 

 Plate 62, Fig. 5 



Osachila levis Rathbun, Proc. U.S. Nat. Mus., vol. 21, p. 612, 1898; 



Bull. 166, U.S. Nat. Mus., p. 254, pi. 78, figs. 3 and 4, 1937. 

 Osachila lata Crane, Zoologica, vol. 22, no. 7, p. 100, 1937 (part: the 

 female specimen, Sta. 150: D16, pi. 1, figs. 3 and 4). 

 Type locality. — Off Cape San Lucas, Lower California, 31 fms. 

 TyM— USNM No. 21598. 



Range. — From off Cape San Lucas, Lower California (Albatross), 

 to La Plata Island, Ecuador (Velero III) ; Galapagos Islands (Velero 

 III). 



Diagnosis. — Surface smooth and punctate, length almost as great as 

 width. Front projecting, bilobate. Anterolateral margins dentate on ante- 

 rior two-thirds only. Hand paved with sharp tubercles arranged in rows. 

 Leg surfaces entirely smooth. 



Material examined (8 specimens from 5 stations). — • 

 155-34. Off Tagus Cove, Albemarle Island, 50-60 fms, Jan. 15, 1934, 

 1 male, 1 female (USNM No. 69754), 1 male (AHF no. 34048). 

 172-34. East of Wreck Bay, Chatham Island, 12 fms, Jan. 21, 1934, 



fragment of carapace (AHF no. 34049). 

 190-34. Lat. 0° 55' S, Long. 90° 30' W, 58-60 fms, Jan. 26, 1934, 1 

 female (AHF no. 34050). 



