TWO NEW SPECIES OF TREMATODE WORMS OF THE 

 GENUS EUCOTYLE FROM NORTH AMERICAN BIRDS 



3j Emmett W. Price 



Of the Zoological Division, Bureau af Animal Industry, United States Depart- 

 ment of Agriculture 



In this paper two species of trematodes which appear to be new 

 are described. These forms belong to the family Eucotylidae 

 Skrjabin, 1924, and to the genus Eucotyle Cohn, 1904. The first 

 of these was collected in 1897 from the intestine of Colymbus auritus 

 by Dr. A. Hassall, at Washington, D. C. For this species the name 

 Eucotyle hassalli is proposed. The second species was found mixed 

 with some specimens of echinostomes which were collected from the 

 intestine of a blue-winged teal, killed at Lake Garberson, Miles City, 

 Mont., by Everett E. Wehr, of the Zoological Division, May 20, 

 1929. For this species the name Eucotyle wehri is proposed. 



Despite the fact that these trematodes were recorded as from the 

 intestine by the collectors, it is quite improbable that the intestine 

 is their normal location, since all members of the genus are parasites 

 of the urinary tract. It appears reasonable to assume, therefore, 

 that during evisceration they escaped from their normal location in 

 the urinary tract and adhered to the outside of the intestine, and 

 were later found in the washings from the intestines. 



The genus Eucotyle was proposed by Cohn (1904) for a trema- 

 tode which was named Monostomum nephriticum by Mehlis (in 

 Creplin, 1849). Skrjabin (1920) described a species, Eucotyle 

 zakhwrowi^ from the renal tubules of Fuligula cristata in Russia, 

 and later (Skrjabin, 1924) he described an additional species,. 

 E. cohni^ from the kidney tubules of Podiceps nigricollis and 

 P. griseigena, collected in Russian Turkestan. The characters of the 

 genus as emended by Skrjabin are as follows : 



Genus EUCOTYLE Cohn, 1904 



Generic diagnosis. — Elongated, flattened, medium-sized mono- 

 stomes; anterior end triangular and set off from the remainder of 

 body by a dorsal and ventral transverse muscular ridge, posterior 



No. 2824.— Proceedings U. S. National Museum, Vol. 77, Art. I. 



84210—30 1 



