34 DEPARTMENT OF GAME AND FISHERIES No. 9 



to 0.279 mm. long by 0.310 mm. to 0.434 mm. wide; the posterior testis is 

 irregular to almost spherical in outline, 0.186 mm. to 0.310 mm. long by 0.263 mm. 

 to 0.372 mm. wide. Ovary ovoid, 0.108 mm. to 0.124 mm. by 0.124 mm. to 

 0.170 mm., situated slightly to the right of the median line and with its long 

 axis diagonal to the long axis of the body. The vitellaria are composed of large 

 follicles distributed as in the other members of the genus; the follicles extend 

 anteriorly to the level of the posterior margin of the acetabulum or slightly 

 beyond, but never farther forward than the anterior margin of the acetabulum. 

 Uterus short, consisting of a few irregular coils almost filling the intercecal space 

 between the anterior testis and acetabulum, and containing from 4 to 40 eggs. 



Eggs oval, 0.68 mm. long by 0.4.5 mm. wide with yellow^ish brown, thin shells.. 



Parametorchis canadensis. Price, 1929. 



Collected from the gall bladder of a mink in the vicinity of the Experimental 

 Fur Farm, Kirkfield, and submitted to Dr. Emmett \\\ Price, Zoological Division, 

 Bureau of Animal Industry, Washington, D.C., and described by him as a new- 

 species, Proceedings National Museum, Vol. 76, Art. 12, as follows: 



Bod\' linguiform, transparent, 1.7 mm. to 2 mm. long. 0.590 mm. to 0.687 

 mm. wide in the region of the anterior testis. Oral sucker terminal, 0.93 mm. 

 to 0.108 mm. long by 0.140 mm. to 0.155 mm. wide. Prepharynx absent; 

 pharynx muscular, 0.108 mm. to 0.140 mm. long by 0.62 mm. to 0.93 mm. wide. 

 Oesophagus very short; intestinal ceca slightly sinuous terminating 0.70 mm. 

 to 0.90 mm. from the posterior end of the body. Acetabulum 0.125 mm. long 

 by 0.140 mm. wide, weakly muscular, and situated about 0.470 mm. from the 

 anterior end. Testis oval or slightly indented, and situated tandem in the 

 posterior half of body; they are about equal in size, 0.186 mm. long by 0.125 mm. 

 wide. Cirrus pouch absent. Seminal vesicle slender and sinuous, its posterior 

 end lying on a level with the centre of the acetabulum. Ovary trilobed, small, 

 and situated about twice its own length in front of the bifurcation of the excretory 

 vesicle. Receptaculum seminis large and piriform, and situated to the right 

 and caudad to the ovary. X'itellaria lateral, extending from a short distance 

 caudad to the oesophagus bifurcation to the level of the ovary. Uterus composed 

 of close transverse coils which are filled w^ith small eggs. The genital pore is 

 situated 0.400 mm. to 0.600 mm. from the anterior end of body. Excretory 

 system similar to that in other species of the genus. 



Eggs oval, 0.22 mm. long by 0.11 mm. wide, and yellowish brown in color. 



Echinoparyphium contigiium. Barker and Bastron, 1915. 



Commonh' found in the duodenum of muskrats. Body tapers at the 

 anterior end, bluntly rounded posteriorly; length 3.55 mm. to 4 mm., breadth 

 at level of acetabulum 0.426 mm. Head collar bears two rows of spines, which 

 nearly surround the oral sucker. Prepharynx present. Pharynx bulbous. 

 Oesophagus comparatively long, bifurcating in front of ventral sucker. Ceca 

 proceed to posterior end of body. \'entral sucker placed anteriorly and 

 prominent, 0.271 mm. to 0.291 mm. in diameter. Cirrus sac arises behind 

 ventral sucker and proceeds anteriorly. Mtelline glands extend from posterior 

 of acetabulum to end of body, tending to become more massive below posterior 

 testis. Ovary small and round placed slightly off median line to the left, 

 measuring 0.15 mm. in diameter. Testis large and ovoid situated tandem fashion 



