Vol. XVI, pp. 3-4 February 21, 1903 



. PROCEEDINGS 



OF THK 



BIOLOGICAL SOCIETY OF WASHINGTON 



DESCRIPTION OF A NEW SPECIES OF GECKO 

 FROM COCOS ISLAND. 



BY LEONHARD STEJNEGER. 



[By permission of the Secretary of the Smithsonian Institution.] 



Professor P. Biolley, naturalist of the Museo Nacional, San 

 Jose, Costa Rica, visited Cocos Island, off the western coast of 

 Costa Rica, in 1 002, and has sent me specimens of two species 

 of lizards for identification. One is the Anolis toicmsendi de- 

 scribed by me recently (Bull. Mus. Comp. Zool., XXXVI, No. 

 6, p. 163, Nov., 1900) from the same island. The other is a 

 new gecko of the genus Sphcerodactyhts which has its center of 

 distribution in the West Indies but of which several species are 

 also known from Central America and northern South America. 



Sphaerodactylus pacificus, sp. nov. 



Diagnosis. — Dorsal scales very small, juxtaposed, keeled; ear-opening 

 same size as digital disc; large supranasals separated by two scales, a 

 third median scale anterior to them in the posterior cleft of rostral: 

 scales on top of head keeled. 



Type.— 13. S. National Museum, No. 31057; Cocos Island; Prof. Biolley, 

 collector. 



Habitat. — Cocos Island, Pacific Ocean off the west coast of Costa Rica, 



Description of type specimen. — Adult; U. S. Nat. Mus., No. 31057. 

 2— Proc. Biol. Soc. Wash. Vol. XVI, 1903. (3) 



