Art. VI. — Report on the Reptiles brought by Professor James Orton from the middle 



and upper Amazon, and western Peru. 



By E. D. Cope. 



The following pages contain a list of the species as expressed in the above 

 title, including descriptions of such as have not been previously known to zoology. 

 A report on the Batrachia obtained by Prof. Orton has already appeared,* which 

 included thirty-six species ; of these fourteen were believed to be new. The 

 present list embraces seventy-four species, of which seventeen are new. The 

 Lacertilia number thirty-three species, the Ophidia forty-one. 



The localities at Avhich the greater number of species were obtained are : 

 Santarem (on the lower Amazon) ; Solimoens (or middle Amazon) ; the Maranon 

 (or upper Amazon) at several points, viz., near the mouth of the Napo, at Iquitos 

 and Nauta on the Peruvian and Ecuadorian borders ; on the Huallaga between 

 Balsa Puerto and Moyabama, and near Moyabamba and Rioja, Peru. A few 

 specimens were obtained near Lake Titicaca, which represent three species, viz. : 

 Cyclorhamphus cemaricus, Cope; Tachymenis chilensis, Schlegel; and Proctotretus 

 multiformis, Cope. These all belong to genera of the Pacific side of the Andes, 

 none of which are known from east of that range, and the Tachymenis chilensis is 

 the commonest snake of Chili and western Bolivia. The indications respecting 

 the fauna of eastern Peru furnished by Professor Orton's collections are, that it 

 differs in no essential respect from that of the great Amazon valley. 



The Peruvian species were mostly derived from the valley of Jequetepeque, 

 which extends from the Cordillera of Caxamarca to near the coast at Pacasmayo. 

 They are sixteen in number, and include type forms of the West Coast Fauna in 

 the genera Microlophus and Craniopeltis. 



LACERTILIA. 



LEPTOGLOSSA. 



1. Mabuia cepedei, Gray; Cope, Proceed. Academy Philada. 1802, p. 186. 



Nauta. 



2. Matjbta surinamensis, HalloTvell, Cope, loc. cit. 



From the Maranon near the mouth of the Napo. 



* Proceedings Academy Philada., 1874, p. 120. 



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