This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1898 Excerpt: ...as in Plagiaulax, but the four premolars smooth on the outer face, only notched at the cutting edge. An imperfect maxilla ascribed to this genus on evidence not stated (fig. 147 A, B) exhibits teeth much like those of Bolodon. The known species are as small as those of Plagiaulax, and occur in the Upper Jurassic of ...
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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1898 Excerpt: ...as in Plagiaulax, but the four premolars smooth on the outer face, only notched at the cutting edge. An imperfect maxilla ascribed to this genus on evidence not stated (fig. 147 A, B) exhibits teeth much like those of Bolodon. The known species are as small as those of Plagiaulax, and occur in the Upper Jurassic of Wyoming, U.S.A. Ptilodus medicevus; imperfect left mandibular ramus, from the outer (a) and inner (6) aspects, nat. size, and from the oral aspect (c) ij nat. size.--L. Eocene (U. Puerco); New Mexico. (After Cope.) Detached teeth and fragments of jaws apparently identical with those of the Plagiaulacidae have also been found in the uppermost Cretaceous (Laramie Formation) of Wyoming. Only the third and fourth premolars have been observed in the lower jaw, while the third is relatively small with a single root. It is also noteworthy that the large fourth premolar is often very low, its summit being elevated but little above the true molars behind it. The family does not appear to have become extinct either in Europe or North America until early Tertiary times, for at least one genus (Neoplagiaulax) occurs in the Lower Eocene of Rheims, France, and another (Ptilodus, fig. 148) in the Puerco Eocene of New Mexico. The mandible in these genera is of much interest because it exhibits the most extreme specialization of the teeth in the family. In the French genus only the fourth premolar remains, much enlarged, while in the American genus (fig. 148) the same is observable, with only an insignificant remnant of the third premolar. The two typical multitubercular molars are present in each. Another family (Polymastodontidae) is represented by many detached teeth in the Laramie Formation and by more satisfactory remains in the Puerco Eocene of the United S...
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Seller's Description:
This is an ex-library book and may have the usual library/used-book markings inside. This book has hardback covers. With usual stamps and markings, In poor condition, suitable as a reading copy. No dust jacket. Re-bound by library. Gold illuminations on cover and backstrip. Top of most pages waterstained. Pages agetoned with some foxing. Please note the Image in this listing is a stock photo and may not match the covers of the actual item, 1250grams, ISBN:
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Seller's Description:
This is an ex-library book and may have the usual library/used-book markings inside. This book has hardback covers. In poor condition, suitable as a reading copy. No dust jacket. Octavo. Blue cloth covers with gilt lettering on front cover and backstrip. Blindly stamped bands on covers and backstrip. Covers coming loose. Backstrip torn and fraying. Bumped corners and scuffed edges. Contains a loose endpage at the front of the book. Contains names of previous owners. Foxing. Contains pen markings. Loose binding. Please note the Image in this listing is a stock photo and may not match the covers of the actual item, 1050grams, ISBN:
