MAMMALIA. 9] 
[6.] 1. Scatops Canapensis. (Cuvier.) Shrew-Mole.* 
Genus. Scalops. Cuvier. 
Brown Mole. PenNNaNnT. Arctic Zool., vol.i. p. 141. 
Sorex aquaticus. Lin. Syst. 
Musaraigne-taupe. Cuvier. Tab. Elém. 
Scalope de Canada. Cuvier. Régne An., vol.i. p. 134. 
Shrew-Mole. Gopman. Nai. Hist. vol. i. p. 84, t. v. fig. 3. 
Mole. Lewis anDCLarKE. Journey, &c., vol. iii. p. 42. 
DESCRIPTION. 
Dental formula, incisors 2, grinders 5 = 44. 
The two wpper incisors have an exact resemblance, in shape and position, to the two middle 
incisors of man. ‘They occupy the end of the jaw, and are twice as broad, and somewhat 
higher than the grinders which immediately follow. The four first grinders of a side are 
conical, and obscurely three-sided. The fifth is a little compressed, and has a minute pro- 
jection at its base posteriorly. The sixth is still more compressed, and has a larger posterior 
projection. These six anterior grinders (termed conical teeth or false grinders by some 
authors) are nearly equal to each other in height, and occupy the whole jaw between the 
incisors and posterior higher grinders. ‘They stand at equal but small distances from each 
other, and from the incisors, not exceeding the quarter of the breadth of a single tooth. The 
four posterior grinders are larger, and rather exceed the incisors in height. The first of them, 
or seventh grinder, does not differ much from the preceding one; it is compressed, has 
an acute lobe posteriorly, and a minute one on the inside anteriorly. The two next grinders 
are composed of two exterior triangular folds of enamel, and one interior one, producing, 
besides some subordinate points, three conspicuous sharp ones, of which the interior one is 
lower than the other two. The tenth or last grinder is smaller than the two which precede it. 
In the lower jaw, there are two incisors, shaped like the upper ones, but much smaller and 
lower than the closely adjoining grinders. They are succeeded on each side by seven small 
conical but rather obtuse grinders, which are flat on the inside. These teeth are close to each 
other, but do not touch, and they have their points gently inclined forwards. They increase 
gradually but slightly in height, in proportion as they are situated further from the incisors ; 
and the three which are farthest back have a minute projection at their bases posteriorly. 
The foremost of these conical teeth on each side, which is almost in contact with the incisors, 
closely resembles the two which follow it; but it is by many considered as an incisor, and 
when one or both lower ‘incisors have dropped out, it does indeed approach to its fellow, and 
then becomes more opposed to the upper incisors. They stand, like the other grinders, 
* The English trivial name of Shrew-mole is a translation of Pennant’s epithet Sorex talpeformis, or of Cuvier’s 
Musaraigne-taupe, and is adopted from Dr, Godman. 
Cc 
