No. 10 garth: brachyuran fauna of the galapagos 447 



Leptodius occtdentalis A. Milne Edwards, Crust. Reg. Mex., p. 269, 

 1880. Rathbun, Proc. U.S. Nat. Mus., vol. 21, p. 589, 1898; Bull. 

 152, U.S. Nat. Mus., p. 301, pi. 137, figs. 3-4; pi. 138, fig. 2 and 

 synonymy, 1930. 

 Xanthodius occtdentalis Boone, Zoologica, vol. 8, no. 4, p. 195, figs. 67A- 

 B, 1927. 



Type locality. — Panama and Manzanillo, Mexico. 



Type. — Not extant. 



Range. — From Magdalena Bay, Lower California (Orcutt), and 

 Guaymas, Sonora, M.tx\co ( Albatross )jto Manzanillo, Mexico (Orcutt), 

 Galapagos Islands (Albatross). 



Atlantic analogue. — L. floridanus (Gibbes). 



Diagnosis. — Anterolateral margin thin, 5-toothed, including orbital 

 tooth. Carapace with transverse ridges. Outer surface of palm without 

 longitudinal furrows. 



Material examined. — None from the Galapagos taken by Hancock 

 Expeditions. Through the courtesy of Miss Jocelyn Crane of the New 

 York Zoological Society the specimen taken at Gardner Bay, Hood Is- 

 land, by the Arcturus Expedition and recorded as Xanthodius occidentalis 

 Boone (1927) was made available for examination and was found to 

 agree substantially with Hancock specimens of Leptodius occidentalis 

 from the Gulf of California. 



Remarks. — Like its congeners, L. cooksoni and snodgrassi, Leptodius 

 occidentalis is an intertidal species and would scarcely be taken "while 

 diving in fifteen feet of water," as reported by an earlier expedition. 



Leptodius snodgrassi Rathbun 

 Plate 83, Fig. 1 



Leptodius snodgrassi Rathbun, Proc. Washington Acad. Sci., vol. 4, p. 



279, 1902; Bull. 152, U.S. Nat. Mus., p. 303, pi. 139, text fig. 47a 



and b, 1930. Finnegan, Journ. Linn. Soc. London, ZooL, vol. 37, 



p. 631, 1931. Hult, Arkiv for Zoologi, Band 30A, no. 5, p. 13, 1938. 



Type locality. — Black Bight, Albemarle Island. 



Tj;^e.— USNM No. 24831. 



Range. — Known only from the type locality and a nearby reef, ( Hop- 

 kins-Stanford Expedition), and from Conway Bay, Indefatigable Island 

 (Crossland). 



Diagnosis. — ^Anterolateral margin thin, 5-toothed, including orbital 

 tooth. Carapace with numerous transverse ridges. Outer surface of palm 

 with longitudinal carinae. 



