ART. 1 



TWO NEW TREMATODE WORMS PRICE 



tion. The genital pore is situated immediately in front of the cirrus 

 pouch and to the right of the median line. The vitellaria are com- 

 posed of small uniform follicles and extend from a short distance 

 behind the transverse muscular ridge to about one-third of the 

 body length from the posterior end. Eggs oval, 22/* long by II/a 

 wide, yellowish brown in color. 



Host. — Colymbus auritus. 



Location. — Intestine according to label; probably urinary tract. 



Distribution. — United States (Washington, D. C). 



Type specimens. — United States National Museum Helminthologi- 

 cal Collection No. 29186 ; paratype No. 29187. 



Eucotyle Jmssalli apparently occupies a position intermediate be- 

 tween E. nephritica (Mehlis) and E. cohni Skrjabin. In E. nephri- 

 tica the testes are elongate, entirely extracecal, and partially encroach 

 upon the vitelline fields, while in E. hassaUi the testes are bifurcate 

 at the poles, have their anterior part partly overlying the ceca, and 

 are separated from the vitellaria by a distinct space. This species 

 may be differentiated from E. cohni on the basis of body and egg 

 sizes, E. hassalli being a much smaller form and the eggs about one- 

 half the size of those of E. cohni. 



EUCOTYLB WEHRI, new species 



Specific diagnosis. — Eucotyle: Body elongate, 2.4 mm. long by 387]!/- 

 wide; anterior end set off from remainder of body by a transverse 



FiGUEE 2. E0COTYLE WEHEI. VENTKAL VIEW 



ridge 387/t from the anterior end. Cuticle covered with blunt spines 

 measuring 7/x in length. Oral sucker subterminal, 170/x, in diameter, 

 weakly muscular. Prepharynx absent; pharynx 78//, in diameter. 

 Esophagus 233/* long and provided with a dilation a short distance 

 from the pharynx, the width of the dilation being slightly greater 

 than that of the pharynx. Intestinal ceca sinuous and extending to 

 about 210/* from the posterior end of body. Testes lobed, 112/* long 

 by 75/1 wide, partly extracecal but largely overlying the ceca, and 

 situated near the equator of body. Cirrus pouch containing the 

 seminal vesicle oval, llO/i long by 75/* wide, and situated in the 

 median line to right of the ovary. Ovary lobed, 112/i long by 75/* 

 wide, and situated to the left of the median line about 150/* in front 

 of testes. Keceptaculum seminis and Laurer's canal not observed. 



