Number 107 Fkbruary 25, 1922 



OCCASIONAL PAPERS OF THE MUSEUM OF 

 ZOOLOGY 



UNIVERSITY OF MICHIGAN 



Ann Arbor, Michigan Published by the University 



A NEW GASTROTHECA FROM VENEZUELA 

 By Helen Thompson Gaige 



The collection of amphibians made by the University of 

 Michigan-Williamson expedition to Venezuela includes a sin- 

 gle specimen of the genus Gastrotheca which is easily separ- 

 able from any of the hitherto described species. The new 

 form is apparently nearest G. longipes Boulenger, from which 

 it may be distinguished by the difference in coloration, the 

 shorter legs and the greater webbing of the fingers and toes. 



The specimen is a female, with the pouch filled with young 

 almost ready to emerge in the adult form. One of these, on 

 which a pouch is already visible, measures 12 mm. in length. 



Gastrotheca williamsoni, new species 



Type Specimen: Cat. No. 55559, Museum of Zoology, Uni- 

 versity of Michigan. Collected by E. B. Williamson (for 

 whom it is named), from the leaf of a heliconid at San Este- 

 ban, Venezuela, on February 2, 1920. 



Diagnosis: Derm of head free; skin only slightly granular; 



