378 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 5 



proves it to be identical with the Eupleurodon under consideration. It is 

 exceedingly unfortunate that three questionable species, Eupleurodon 

 trifurcatus Stimpson (1871), Epialtus peruvianus Rathbun (1924) 

 (which should be transferred to Eupleurodon and given another specific 

 name), and Eupleurodon rathbunae Garth were all described from single 

 specimens and that the type of the first no longer exists. Having found 

 so little infiltration of the Peruvian crustacean fauna into the Galapagos 

 Islands, the writer deemed it best to consider a specimen of doubtful 

 affinities a distinct, endemic species, rather than to attribute to a mainland 

 species, and particularly a sub-Antarctic one, an extension of range having 

 far greater implications than are justified under the circumstances. To 

 quote the pioneer carcinologist, Wm. Stimpson : "We have named it be- 

 cause we consider it far better for the interest of science to admit a slight 

 risk of adding a synon3^m, than to refer a species to a locality at which it 

 does not exist, which would tend to confuse our ideas upon geographical 

 distribution, a knowledge of which constitutes one of the most important 

 aims in our investigation of species." (Ann. Lye. Nat. Hist. New York, 

 vol. 7, p. 50 (178), 1860.) 



Genus TALIEPUS A. Milne Edwards, 1878 

 Taliepus marginatus (Bell) 



Epialtus marginatus Bell, Proc. Zool. Soc. London, vol. 3, p. 173, 1835; 

 Trans. Zool. Soc. London, vol. 2, p. 62, pi. 11, fig. 4, 4i-k; pi. 13, 

 1836. 

 Taliepus marginatus Rathbun, Bull. 129, U.S. Nat. Mus., p. 164, pis. 52 

 and 53 ; pi. 220, fig. 2; pi. 221, and synonymy, 1925. 



Type locality. — "Ad oras Brasiliae." 



Type. — Not extant. 



Range. — From Independencia Bay, Peru (Coker) to Guaiacan, Chile 

 (Lenz) ; Galapagos Islands (Bell) ; Brazil (Bell). 



Diagnosis. — Carapace smooth, broadly oval. A preorbital but no post- 

 orbital tooth. A small hepatic and large anterolateral tooth. An inferior 

 distal tooth on the propodus of each ambulatory leg. Chelipeds of adult 

 male large and powerful. 



Material examined. — None from the Galapagos Islands. The Han- 

 cock collections contain specimens from Independencia and San Juan 

 Bays, Peru. 



