24 DEPARTMENT OF GAME AND FISHERIES No. 9 



Eggs not numerous, yellow in colour, situated between the ventral sucker 

 and the anterior testis, length 0.077 mm. to 0.126 mm., width 0.048 mm. to 

 0.097 mm. 



Niidacotyle novicia. Barker. 1916. 



A very small monostome found frequently in the duodenum of muskrats, 

 0.708 mm. to 0.727 mm. long by 0.329 mm. to 0.388 mm. wide. The anterior 

 end is rounded, tapering towards a small oral sucker. Posteriorly the body 

 terminates very bluntly. It is distinctly convex dorsally. The oral sucker is 

 cone-shaped and connected to the ceca by a short fleshy oesophagus. The ceca 

 are comparatively large and bifurcate in a bell-shaped manner, ending in the middle 

 region of the body. Testes situated opposite to each other in the postero- 

 lateral region of the body. The ovary lies between the testes, with shell gland 

 anterior to it. The cirrus sac is large and lies transversely slightly below the 

 middle region of the body. The uterine loops occupy the entire width of the 

 body for some distance anterior to the cirrus sac. 



The eggs measure from 0.020 mm. to 0.023 mm. long by 0.011 mm. to 

 0.012 mm. wide. 



Catatropis filamentis. Barker, 1915. 



Transparent monostome found in the small intestines of muskrats. Fresh 

 specimens measure from 2.15 mm. to 3.05 mm. in length by 0.873 mm. to 

 0.970 mm. in width. Oral sucker subterminal from 0.116 mm. to 0.145 mm. in 

 diameter. Oesophagus 0.107 mm. to 0.130 mm. in length. Three rows of flat 

 papillae on ventral surface. Cecum bifurcates a short distance anterior to the 

 genital pore, continuing in an undulating manner to the posterior end of the 

 body. Cirrus sac long and narrow. Uterine loops occupy the intercecal space 

 between the base of the cirrus and the shell gland. Mtellaria extracecal extend 

 from slightly posterior to middle of body and end in front of the testis. The 

 testes are dendritic in shape located opposite to each other in the posterior 

 region and are extracecal. Ovary rounded to oval and is directly between the 

 testes. The shell gland large and anterior to the ov'ary. Excretory canal 

 irregular in shape and posterior to the ovary. 



Eggs small and transparent measuring from 0.020 mm. to 0.022 mm. in 

 length by 0.010 mm. to 0.011 mm. in width. 



Notocotyle qiiinqiieserilae. Barker and Laughlin, 1915. 



Transparent monostomes found in the small intestines and cecum of musk- 

 rats, measure from 2.08 mm. to 3.06 mm. in length, and from 0.54 mm. to 

 0.82 mm. in width in fresh specimens. The body tapers to the oral sucker and 

 rounds quite bluntly. A prominent characteristic is five longitudinal rows 

 of papillae situated on the ventral surface. The oral sucker subterminal from 

 0.223 mm. to 0.271 mm. in diameter. Pharynx absent. Ceca undulating, 

 arising a short distance below the oral sucker terminating bluntly in the posterior 

 region. Cirrus sac long and narrow. Vitellaria scanty, situated in posterior 

 half of body and covering a space of approximately 0.63 mm. Testes lobed, 

 measuring 0.329 mm. in length. The ovary, round or oval, situated between 

 the testes, with shell gland round and directly in front of it. Uterine loops 

 bounded laterally by the vitellaria and occupying approximately the same 

 length of space. 



Eggs, thin shelled and transparent, measure from 0.018 mm. to 0.022 mm. 

 in length by 0.009 mm. to 0.013 mm. in width. 



