564 
Fig. 
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5 
REPORT OF COMMISSIONER OF FISH AND FISHERIES. 
PLATE 67. 
Echinorhynchus tuberosus Zeder. 
40. Anterior end of ¢ from Catostomus ardens. 
Dacnitis globosa Dujardin. 
41. g and 9 x 34. 
42. Side view of head of ¢, optical section; 0, mouth; ph, pharynx, x 60. 
43. Anterior end of 9; a, front view of head, x 60. 
44, Posterior end of g 5 v, vent; st, anal spines, x 60. 
45. Same, optical section, x 60. 
46. Vulvaof 9, highly magnified. 
Undetermined species of Nematods. 
47. Small nematod, 9, from Salmo mykiss, x 12. 
48. Anterior end of same, X 185. 
49. Posterior end of same, X 185. 
50. Same species, 6, X 12. 
51. Posterior end of same, xX 185. 
52. Small nematods from Catostomus ardens, x 34. 
Drawings by the author from alcoholic specimens. 
