LIST OF PLATES. 
145 
Puate XVII. 
Fig. 1. The Black Squirrel (Sciurus niger). 
2. The Red Squirrel (Sc. hudsonius). 
Puate XVIII. 
Fig. 1. The Little Grey Squirrel (Sciurus leucotis). 
2. The American Seal (Phoca concolor). 
Puate XIX. 
Fig. 1, a. Skull of the Morse (fossil), seen nearly in front, (Trichecus virginianus). 
B. View of the upper jaw teeth of the same. 
2. Skull of the Sable (Mustela martes). 
3, a. Jaw teeth of the Trogontherium ? fossil. 
Lower jaw of the same. 
Puate XX. 
Fig. 1. The Beaver (Castor fiber). 
2. The Musquash (Fibér zibethicus). 
Puare XXI. 
Fig. 1. The American Black Rat (Mus americanus). 
2. The Carolina Shrew (Sorex carolinensis). 
3. Forster’s Shrew (Sorex forsteri). 
4. The Woodchuck (Arctomys monax). 
Pirate XXII. 
Fig. 1. The Tawny Meadow-mouse (Arvicola rufescens). 
2. The Marsh Meadow-mouse (Arvicola riparius). 
Puate XXIII. 
Fig. 1. The Jumping Mouse (Mus leucopus). 
2. The Yellow-cheeked Meadow-mouse (Ar. xanthognathus). 
Puate XXIV. 
Fig. 1. The Light-colored Meadow-mouse (Ar. albo-rufescens). 
Dentition of the same. 
2. The Deer Mouse (Meriones americanus). 
Puate XXV. 
Fig. 1. The Oneida Meadow-mouse (Arvicola oneida). 
2. The Beaver Field-mouse. 
Fauna. 
Dentition of the same. 
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