259] NORTH AMERICAN MONOSTOMES 41 



these to the middle region of the same. The genital glands lie contiguous 

 to one another in the posterior arch of the intestine. The posterior testis 

 lies a little posterior to and a little more nearly in the middle of the arch 

 than the anterior one which is smaller and contiguous to the former, 

 filling out the opposite portion of the intestinal arch. The testes are not 

 separated by uterine loops as is generally true in this genus. The anterior 

 testis is spherical, 910/x in diameter while the posterior testis is slightly 

 elongated and measures 993 n in length by 910/i in width. The ovarian 

 complex lies anterior to and adjacent to the posterior testis. The ovary and 

 shell gland are spherical, equal in size, and measure 413 to 447 n in diame- 

 ter. The small spherical receptaculum seminis lies partially embedded in 

 the shell gland and measures 150/x in diameter. The eggs are thick shelled 

 ovals and measure 150/x in length by 76/* in width. 



Habitat: Intestine Host: Gallinago wilsoni 



Locality: Creston, Iowa Date: August 4, 1894 



Collector: W. C. Hall No. 21.89 Ward Collection 



The direct relationship of this species is not so readily apparent. As 

 to position of the genital glands it holds a place close to Cyclocoelum 

 tringae (Brandes) and Cyclocoelum triangularum nov. spec, and tho it is 

 much larger presents in general the same characteristic features namely: 

 genital glands contiguous, uterine loops directed backward, vitellaria 

 moderately deveoped, oral sucker larger than pharynx. However, in the 

 size of the body and the relative size of the pharynx and sucker as well as 

 the relative size of the genital glands Cyclocoelum wilsoni is clearly distinct 

 and must be recognized as a proper species. 



CYCLOCOELUM CUNEATUM nov. spec. 



[Figures 7, 24] 



Medium sized worms 10.5 to 12 mm in length by 2.5 to 3.5 mm in 

 greatest width which is found at the beginning of the posterior body 

 fourth. From the point of maximum width the margins of the body run 

 approximately parallel to the level of the anterior testis at which point 

 they narrow abruptly to form the obtusely rounded posterior end. From 

 the point of greatest width the margins of the body converge cephalad in 

 almost straight lines to a very narrow and pointed anterior end, which 

 gives the impression of a well formed wedge. At the pointed anterior end 

 is found a very small weakly developed sucker, 198 to 215ju in diameter. 

 This is followed by an oblong pharynx of approximately the same width 

 as the sucker. It measures 150 to 198 n in width by 215 to 231 n in length. 

 The esophagus is three and one-half to four times the length of the pharynx. 

 The intestinal crura are simple. The vitelline glands extend from the 

 middle region of the bifurcation of the intestine to the excretory bladder 



