1879.] -"kl [Cope. 



Eleventh Contribution to the Herpetology of Tropical America. 



By E. B. Cope. 



(Read before the American Philosophical Society, June 20th, 1879. ) 



The materials studied in the preparation of the present paper, are the 

 following : 



1. A collection made at Batopilas in Southern Chihuahua, by Edward 

 Wilkinson, Jr. 



2. Two collections made at Guannjuato on the Mexican Plateau, by Dr. 

 Alfredo Duges. 



3. A collection from the Isthmus of Tehuantepec, by Francis Sumi- 

 chrast. 



4. A collection made in Costa Rica from Jose Zelodon . 



5. Three collections from the Island of Santo Domingo, made by Messrs. 

 Win. M. Gabb an 3 Charles A. Fraser and Dr. J. J. Brown. 



6. A collection from the Island of Dominica, made by Ferdinand Ober. 



7. A collection from the Island of Tobago, also from Ferd. Ober. 



8. A few specimens from North west Bolivia, from the late Prof. James 

 Orton. 



Of these, all excepting Nos. 1 and 8, and a part of No. 2, belong to the 

 Smithsonian Institution, and have been placed in my hands for identifica- 

 tion, by Professor Baird, the Secretary. 



No. I. Batopilas, Wilkinson. 



Batopilas is a mining town of Chihuahua, in a region celebrated for the 

 extent and richness of its silver deposits. It is on the western side of the 

 water shed of the Cordilleras on the upper waters of a tributary of the 

 Rio Fuerte, which forms in the lower part of its course the boundary 

 dividing the States of Sonora and Cinaloa. The surrounding country is 

 mountainous and dry. 



This locality is one of especial interest in its relations to the faunal dis- 

 tricts of the adjacent parts of Mexico and the United States. The absence 

 of Batrachia and Turtles from Mr. Wilkinson's collection shows its simi- 

 larity to the elevated regions north and south of it. 



Lacertilta. 

 1. Anolis nebulosus Wiegm. 

 """■"2. Cyclura acanthura Wiegm. 



3. Uta bicarinata Dum. 



4. Sceloporus tristichus Cope. Report U. S. G. G. Survey W. of 100th 

 Mer. G. M. Wheeler, Vol. Ill, p. 571. 



5. Sceloporus clarkii Bd. Gird. 



6. Phrynosoma comutum Harl. 



7. Phyllodactylus tuberculoma Wiegm. 



8. Cnemidophorus communis Cope, Var. II. Proceedings American 

 Philosophical Society, 1877, p. 95. 



PROC. AMER. PHILOS. SOC. XVIII. 104. 2h. printed august 11, 1879. 



