Vol. 30, pp. 31-34 February 21, 1917 



PROCEEDINGS 



OF THE 



BIOLOGICAL SOCIETY OF WASHINGTON 



A NEW SPECIES OF HORNED TREE-TOAD FROM 



PANAMA. 



BY LEONHARD STEJNEGER. 



(Published by permission of the Secretary of the Smithsonian Institution.) 



The discovery of a species of Cerathyla in Panama adds a new 

 genus to the batrachian fauna of the Isthmus. This genus has 

 been known hitherto only from the Andes of Ecuador, Bolivia 

 and Peru. It is not only one of the rarest genera in collections, 

 but its aspect is also very singular, due to the large triangular 

 head with its bony casque posteriorly extended as two pointed 

 horns, and the dermal flaps on snout and eyelids. Its mode of 

 propagation is equally peculiar. 



The specimen and its young, which form the basis of the 

 following description, was collected by Mr. Charles Gordon 

 Holland, Asst. Paymaster, U. S. N., while attached to the 

 U. S. S. Leonidas, on May 20, 1915, at Signal Loma (Loma 

 Peak) on the north coast of Panama three miles south of San 

 Isabel. 



Cerathyla panamensis sp. nov. 



Diagnosis. — Edge of upper eyelid medially with a triangular dermal 

 pyramid ending in a pointed conical tubercle ; snout with a short slender 

 pointed dermal appendage; tibio-tarsal joint not reaching tip of snout; 

 tongue longer than wide ; distance from extremity of one of the lateral 

 processes of helmet to the other less than its distance from the tip of 

 snout, and less than two and one-half times the interorbital width ; inter- 

 orbital width more than three times the distance between nostrils, more 

 than twice the width of upper eyelid; distance from nostrils to tip of 

 snout nearly equalling their distance from orbits and nearly twice their 

 distance between each other. 



Habitat . — Panama . 



11— Proc. Biol. Soc. Wash., Vol. 30. 1917. (31) 



