Full-Page and Other Illustrations 



XXVll 



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36. — A 5-inch aspen just fallen 



37. — Succession of attitudes in diving 



38.— Feet of adult male Beaver (left side), taken near Fort Resolution 

 M. T 



39- — Life sketches of Beavers at work .... 



40.— Left upper molars of genus Pewmyscus. Left upper molars of 

 genus Mus. (Both greatly enlarged) 



41- — The diseased Mouse and one of its parasites 



42. — Skull and teeth of Onychomys leucogasler (Wied) . 



43- — Tracks of Grasshopper-mouse, or Calling-mouse, going towards 

 right, Yellowstone Park 



44.— Left upper molars of genus Pewmyscus. Left upper molars of 

 genus Mus. (Both greatly enlarged) .... 



45- — Head of Deermouse showing the cheek pouches distended 



46. — Tracks of Deermouse. (Running to left) .... 



47. — Nest of Prairie Deermouse, Carberry, Man. 



48. — Meadow-mouse Microlus pennsylvanicus (Ord.) 



49. — Molar enamel-pattern of Microtus pennsylvanicus 



50. — Right hind-foot of Driunmond Vole ..... 



51. — Midden-heap of Microtus drummondi, with 2 back doors con 

 tributory .......... 



52. — Midden-heap of Microtus pennsylvanicus, with 6 back doors con 

 tributory .......... 



S3. — Mastology of: Evotomys athabascae; Microtus drummondi; Peromyscus 

 arcticus ......... 



54. — Molar enamel-pattern of Microtus {Pedomys) austerus 



55. — Log that was a favourite landing-place and news-depot of the 

 Muskrats on a small stream 40 miles east of Kippewa, Que 

 With illustrations of their scatology 



56. — Sketch and plan of a Muskrat den at Cos Cob, Conn. 



57. — Section of the simplest style of den made by Muskrat, Cos 

 Conn. ......... 



58. — A large rat-house sketched at Lake Winnipegosis. As seen 

 above, and in plan ....... 



59. — Tracks of Muskrat ....... 



60. — Muskrat foot with the tiny hoofs .... 



61. — Right fore-paw and hind-foot of T. fossor i{ 



62. — Life studies of Thomomys lalpoides. .... 



63. — Composite plant. (Food of Thomomys) 



Cob 

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