United States or Morocco ? Vote for the TOP Country of the Week !
This suggests to me an idea relative to the horse, the last important member of the pachydermata which remains to be spoken of. It also has its canines, but very small ones; they disappear, so to speak, in a large vacancy between the incisors and the molars, where man inserts the bit, by means of which the animal has been subdued.
The teeth are very peculiar, as the molars have a projecting cutting edge on the exterior side; thus the jaws when closed form a pair of shears, as the projecting edges of the upper and lower rows overlap: this makes a favourable arrangement of nature to enable the animal to clip off twigs and the branches upon which it feeds, as, although it does not absolutely refuse grass, the rhinoceros is decidedly a wood eater.
In the Cainotherium, also, the second metacarpal is developed, but is much shorter than the third, while the fifth is absent or rudimentary. In this respect it resembles Anoplotherium secundarium. This circumstance, and the peculiar pattern of the upper molars in Cainotherium, lead me to hesitate in considering it as the actual ancestor of the modern Tragulidae.
Thus they all have the same number of teeth as man possessing four incisors, two canines, four false molars, and six true molars in each jaw, or 32 teeth in all, in the adult condition; while the milk dentition consists of 20 teeth or four incisors, two canines, and four molars in each jaw.
In these the skull was remarkably similar to that of the carnivores, or flesh-eating mammals, and the teeth, unlike the teeth of any later reptiles, were divisible into incisors, canines, and molars, as are the teeth of mammals. At the opening of the Mesozoic era reptiles were the most highly organized and powerful of any animals on the earth.
How could they risk even a thrust when he had those huge brutes, with their fierce and bloodshot eyes, and their square heads, whose jaws were like a vise, with enormous white teeth, that were as sharp as daggers, and whose huge molars crunched up beef-bones to a pulp with them?
But this resemblance is confined to general appearance, as in the prominence of the canines, and in the cutting shape of the molar teeth. For the teeth really differ much: thus the dog has on each side of the upper jaw four pre-molars and only two molars; while the Thylacinus has three pre-molars and four molars. The molars also differ much in the two animals in relative size and structure.
These insects are often enveloped in a very hard outer case, which molars like ours would have some difficulty in chewing properly; consequently the molars of our little friend are fringed with conical points, and with these she grinds down her prey without difficulty. In America there is a large bat, the vampire, which lives on the blood of animals, and nature has armed it accordingly.
The teeth are much more numerous, although the molars exhibit the zeuglodont double fang; the nasal bones are very short, and the upper surface of the rostrum presents the groove, filled up during life by the prolongation of the ethmoidal cartilage, which is so characteristic of the majority of the Cetacea.
Luck clapped his hand to his perspiring forehead and murmured "Oh, my Gawd!" like a prayer, and shut his eyes to hide from them the desecration. He opened them to find that the caste was just flicking off and the first scene dissolving in. The man at his left gave a long sigh and crossed his knees, and leaned back and began to chew tobacco rapidly between his worn old molars.
Word Of The Day