GARMAN: THE REPTILES OF EASTER ISLAND. 9 



Chelonia depressa. 



Green Tortoise. 

 Chelonia depressa Garman, Bull. Mus. Comp. Zool., 1880, vol. 6, 124. 



The locality given with the type of this species is North Australia. Whether 

 it was a wanderer there has not yet been determined. Though very distinct from 

 C. japonica in the adult stage, it may be much more closely allied to it in the 

 young, in which case indentification of small specimens may present some 

 difficulties. 



Eretmochelys squamosa. 



Hawk Bill or Shell Tortoise. 



Eretmochelys squamata Agassiz, Contr., 1857, vol. 1, 382 (not T. squamata Gmelin). 

 Caretta squamosa Girard, U. S. Expl. Exp. Herp., 1858, 442, pi. 30, figs. 1-7. 



Except to the westward and the north the distribution of this tortoise is but 

 partially indicated by the following localities : Japan, Formosa, China, Singapore, 

 Sulu Seas, Moluccas, Bengal, Indian Ocean, Zanzibar, Mauritius, Sunda Islands, 

 Torres Straits, Bismarck Archipelago, Southern Pacific Ocean, Society Islands, 

 Isle de Carmen, Gulf of California. Eight specimens show no variations in costals 

 and frontals. In eight specimens of E. imbricaia, from the Atlantic, there are 

 three which vary from the normal, of four costals each side and two pairs of 

 prefrontals ; one of the three has five costals each side, and two pairs and an 

 azygous prefrontal; another has four costals one side and five the other; and 

 the third has five prefrontals, that is, two pairs and an azygous shield. 



OPHIDIA. 



HYDRIDAB. 



Hydrus platurus. 



Anguis platura Linne, Syst., 1766, Ed. 12, 371. 



Hydrus platurus Boulenger, Nat. Fauna Ind. Rept., 1890, 397. 



Scales on the body hexagonal, juxtaposed, irregular and imbricated on the tail. 

 Longitudinal rows fifty-six ; transverse rows three hundred eighty-three on the 

 body, plus fifty-three on the tail. Labials eight on one side, nine on the other ; 

 infralabials eleven on each side. A diamond-shaped interparietal, not in contact 

 with the frontal. About sixteen rows of scales on the back are black ; below the 

 black a yellow band, from around the snout on the supralabials, passes along each 

 flank, occupying about six rows of scales ; below the yellow bands, starting from 

 the chin on the infralabials and along the flanks on each side a band of black, four 

 to six scales in width, continues for about two-thirds of the length beyond which 



