There will be no difficulty in making out the teeth of the Dog now we have studied those of the Cat. We shall find, as before, that there are in the small front bones of the upper jaw three teeth on each side, and the same number in the corresponding part of the lower jaw: these are, of course, the incisors. They are followed by the canines, or great eye teeth, of which, as in the Cat, there is one on each side of each jaw. After the canines, however, come no less than six teeth on each side of the upper jaw, and seven on each side of the lower. It is found that the first four of these are represented in the jaw of the young Dog by milk molars; therefore, as we explained in treating of the teeth in the Cat, these four are premolars, and the remaining three, molars. A likeness to what we find in the Cat exists in the fact that the last premolar of the upper jaw and the first molar of the lower jaw are very large teeth, and bite against one another. These are the _carnassials_ of the respective jaws. Thus the dental formula of the Dog is--incisors, (3-3)/(3-3), canines, (1-1)/(1-1), premolars, (4-4)/(4-4), molars, (2-2)/(3-3) = 42. [Illustration: UPPER VIEW OF WOLF’S SKULL.] [Illustration: UNDER VIEW OF WOLF’S SKULL.] The form of the teeth, as well as their number, comes much nearer to that of an ordinary Mammal, or is much less specially carnivorous than in the Cats. The incisors are proportionally larger than in our first section; their crowns are distinctly divided into three cusps--a large central and two small lateral ones; and the outermost incisors of the upper jaw approach tolerably nearly in shape and size to the canines, being nearly half as long as the latter, and having almost lost their lateral cusps. The canines have much about the same form and relative size as in the Cat, as also have the premolars, except that the first of these, though smaller than its successor, is not so markedly so as in the Cats, while, on the other hand, the last (the carnassial) is proportionally larger. [Illustration: TEETH OF WOLF. The letters have the same significance as in the figure of the Lion’s teeth on p. 13, except _h_, the “heel” of the lower carnassial.]