Fauna Antiqua Sivalensis: Proboscidea. 1846-1847

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Page 30 - Two dental characters, however, exist, though hitherto I "believe unnoticed as such, which distinguish in a wellmarked and unequivocal manner, the genus Mastodon from the genus Elephas. The first is the presence of two tusks in the lower jaw of both sexes of the Mastodon, one or both of which are retained in the male, and acquire a sufficiently conspicuous size, though small in proportion to the upper tusks ; while both are early shed in the female. The second character is equally decisive; it is...
Page 6 - They give a brief historical sketch of the leading opinions which have been entertained by palaeontologists respecting the relations of the Mastodon and Elephant to each other, and of the successive steps in the discovery of new forms which have led to the modifications of these opinions. They state that the results to which they themselves have been conducted, lead them to differ on certain points from the opinions most commonly entertained at the present day, respecting the fossil species of Elephant...
Page 30 - Prof. Owen, in his remarks upon Mr. Fitch's specimen of the last milk-molar (fig. 100), goes on to say, " In Dr. Kaup's figure the tooth in question
Page 5 - Fossil forms, but they propose to trace the affinities, and institute an arrangement of all the well-determined species in the family. They give a brief historical sketch of the leading opinions which have been entertained by...
Page 45 - The crown consists of ten principal ridges, with a subordinate ' talon ' ridge in front and behind. The anterior seven ridges have their summits worn, the two in front being ground down to the common base of ivory, the tooth having been a considerable time in use. " The disposition and relative proportions of the ivory, enamel, and cement bear the closest resemblance to those of the corresponding tooth of E. insignia
Page 30 - The first is the presence of two tusks in the lower jaw of both sexes in the Mastodon. These are retained in the male but shed in the female. The second character is the displacement of the first and second molars in the vertical direction by a tooth of simpler form than the second. One species of Mastodon has been found in England, the M.
Page 1 - ... ever appeared in lithography in this country at all comparable to these plates ; and as regards the representations of minute osseous texture by Mr. Ford, they are perhaps the most perfect that have yet been produced in any country. The work has commenced with the Elephant group, in which, they say, " is most signally displayed the numerical richness of forms which characterizes the Fossil Fauna of India," and the first chapter relates to the PROBOSCIDEA — Elephant and Mastodon.
Page 46 - It appears to have consisted of eight principal ridges, with a ' talon' ridge behind and a subordinate ridge in front. Five of the ridges have been in use, the anterior two in the section being worn down close to the common base of ivory, while the three last ridges are entire. Like the upper molar of A', ijanesn (already referred to), it bears a close resemblance to the corresponding inferior tooth of E.
Page 7 - ... the third set of twelve or thirteen ; the fourth set of fifteen, and so on to the seventh or eighth set, when each grinder consists of twentytwo or twenty-three ; and it may be added, that each succeeding grinder takes at least a year more than its predecessor to be completed.
Page 30 - Fossil remains of proboscidians have subsequently been discovered, principally in the tertiary deposits of Asia, in which the number and depth of the clefts of the crown of the molar teeth, and the thickness of the intervening cement, are so much increased as to establish transitional characters between the lamello-tuberculate teeth of Elephants, and the mammillated molars of the typical Mastodons ;* showing that the characters deducible from the molar teeth are rather the distinguishing...

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