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Updated: May 14, 2025
You can see them all quite plainly in the skiagraph. The left lower lateral incisor had a very small gold filling, which you can see as a nearly circular white dot. In addition to these, a filling of tin amalgam had been inserted while the deceased was abroad, in the second left upper bicuspid, the rather grey spot that we have already noticed.
Moreover, in the least modified mammals, the total number of the teeth is very generally forty-four, while in horses, the usual number is forty, and in the absence of the canines, it may be reduced to thirty-six; the incisor teeth are devoid of the fold seen in those of the horse: the grinders regularly diminish in size from the middle of the series to its front end; while their crowns are short, early attain their full length, and exhibit simple ridges or tubercles, in place of the complex foldings of the horse's grinders.
The calf, at birth, will usually have two incisor or front teeth in some cases just appearing through the gums; in others, fully set, varying as the cow falls short of, or exceeds, her regular time of calving. If she overruns several days, the teeth will have set and attained considerable size, as appears in the cut representing teeth at birth.
He, too, was hungry, so he bit off a juicy flag at the spot marking the junction of the tender stalk with the tough, fibrous stem; then, sitting upright, he took it in his fore-paws, and with his incisor teeth shaped perfectly like an adze for such a purpose stripped it of its outer covering, beginning at the severed edge, and laying bare the white pith, on which he greedily fed.
Thus the teeth of man constitute a regular and even series without any break and without any marked projection of one tooth above the level of the rest; a peculiarity which, as Cuvier long ago showed, is shared by no other mammal save one as different a creature from man as can well be imagined namely, the long extinct 'Anoplotherium'. The teeth of the Gorilla, on the contrary, exhibit a break, or interval, termed the 'diastema', in both jaws: in front of the eye-tooth, or between it and the outer incisor, in the upper jaw; behind the eyetooth, or between it and the front false molar, in the lower jaw.
His mouth seemed to be swollen, and, on examining him, I found that some of his incisor teeth, both in the upper and lower jaw, had been torn out. This somewhat alarmed me; and, on inquiring of the servant, I was told that he suspected that they had had thieves about the house on the preceding night, for the dog had torn away the side of his kennel in attempting to get at them.
With a cup of salt a black man can start an endless chain of trading that will net him a considerable assortment of articles in time. The principal natives in the Upper Kasai are the Balubas, who bear the same relation to this area as the Bangalas do to the Upper Congo. The men are big, strong, and fairly intelligent. The principal tribal mark is the absence of the two upper central incisor teeth.
As the tooth becomes worn off, the length of the free portion is maintained by a pushing out of the tooth, and a corresponding shortening of the portion that is fixed or imbedded in the jaw. The table surface of the unworn incisor tooth is covered with enamel, and in the middle portion the enamel forms a deep cup.
During the second week, a tooth will usually be added on each side, and the mouth will generally appear as in the next cut; and before the end of the third week, the animal will generally have six incisor teeth, as denoted in the cut representing teeth at the third week; and in a week from that time the full number of incisors will have appeared, as seen in the next cut.
Falconer, which is "trivial, not typical." As these oblique furrows form so marked a character of the majority of the teeth, Dr. Falconer gave to the fossil the generic name of Plagiaulax. Nevertheless, the more sudden upward curve of this incisor, as well as other characters of the jaw, indicate a great deviation in the form of Plagiaulax from that of the living kangaroo-rats.
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