356 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 5 



792-38. Off Daphne Minor Island, 70-80 fms, Jan. 20, 1938, 1 male 



(illustrated) (AHF no. 38017). 

 814-38. North of Hood Island, 20-40 fms, Jan. 28, 1938, 1 male, 2 

 young (AHF no. 38018). 

 Measurements. — Female holotype: length 7.2 mm, width 8.0 mm. 

 Color in life. — General appearance pinkish cinnamon with a great 

 number of granules lightly colored with red and vermilion. Some granules 

 a shade darker and a few very highly colored. Eye greenish black. Ventral 

 side same as dorsal but lighter. ( Petersen) 



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

 nullipore, and rock. 

 Depth.— 5-\Q0 fms. 



Remarks. — This is another instance of a species common to the Galap- 

 agos Islands and the Revilla Gigedo group, but not to the adjacent main- 

 land. This time it is Socorro Island, which is nearer the Mexican main- 

 land than Clarion, but still over 400 miles offshore. The remarks made 

 for the preceding species, Clythrocerus laminatus Rathbun, apply here 

 as well. 



Genus LITHADIA Bell, 1855 

 Lithadia cumingii Bell 



Plate 62, Fig. 1 



Lithadia cumingii Bell, Trans. Linn. Soc. London, vol. 21, p. 305, pi. 

 33, f^gs. 6 and 7, 1855. Rathbun, Bull. 166, U.S. Nat. Mus., p. 136, 

 pi. 38, figs. 1 and 2, 7-15, 1937. Crane, Zoologica, vol. 22, no. 7, 

 p. 102, 1937. 



Type locality. — Potrero, Costa Rica. 

 Type.— In Mus. Bell. 



Range. — From Magdalena Bay, Lower California (Albatross), to 

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

 Atlantic analogue. — L. granulosa A. Milne Edwards. 

 Diagnosis. — Skull like in appearance. Carapace with deep hollows and 

 upstanding ridges, especially in male. Rostrum produced, narrow, up- 

 turned, bilobate at tip. A hepatic lobe or tooth, a posterior branchial lobe, 

 and an intestinal pair closely approximated. Hand carinate. 

 Material examined. — 

 177-34. Sulivan Bay, James Island, 5-20 fms, Jan. 23, 1934, 1 male 

 (photographed) (USNM No. 69418). 

 Measurements. — Young specimen, male: length 5.3 mm, width 5.4 

 mm. 



