Museum of Natural History, Vol. VI, On The Affinities of Leptarctus primus of Leidy American By: Jacob Lawson Wortman
In Museum of Natural History, Vol. VI, Jacob Lawson Wortman delves into the fascinating world of the Leptarctus primus, an ancient American mammal. Through meticulous research and detailed illustrations, Wortman provides a comprehensive analysis of the evolutionary affinities of this elusive creature. The author's passion for paleontology shines through in this volume, as he expertly navigates the complexities of the Leptarctus primus's lineage and relationships within the animal kingdom. Wortman's writing is engaging and accessible, making this book a valuable resource for both scholars and casual readers interested in prehistoric life. The illustrations accompanying Wortman's text are both beautiful and informative, helping to bring the Leptarctus primus to life on the page. The attention to detail in these drawings is truly impressive, adding an extra layer of depth to the book's exploration of this ancient mammal. Overall, Museum of Natural History, Vol. VI is a must-read for anyone with an interest in paleontology or natural history. Wortman's expertise and enthusiasm make this volume a valuable addition to any library, offering a captivating glimpse into the evolutionary history of an intriguing and enigmatic creature. First Page: On the Affinities of Leptarctus primus of Leidy. By J. L. WORTMAN. AUTHOR'S EDITION, extracted from BULLETIN OF THE AMERICAN MUSEUM OF NATURAL HISTORY, VOL. VI, ARTICLE VIII, pp. 229 231. New York, July 30, 1894. Article VIII. ON THE AFFINITIES OF LEPTARCTUS PRIMUS OF LEIDY. By J. L. Wortman. Up to the present time but very little has been known of the existence of the peculiarly American family Procyonidæ in any deposits older than the very latest Quaternary. Leidy has described and figured[1] an isolated last upper tooth, from the Loup Fork deposits of Nebraska, under the name of Leptarctus primus , which has been referred to this family. The Museum Expedition of last year into this region was successful in obtaining additional material, which we provisionally refer to Leidy's species. =Leptarctus primus= Leidy . The specimen consists of the right ramus of the lower jaw, carrying the third and fourth premolars and the canine. The condyle is broken away, but the coronoid process and the angle are preserved. The specimen is from a young individual in which the last premolar had just cut the gum. The alveoli of all the other teeth are present and in a good state of preservation. The dental formula is as follows: I. 3, C. 1, Pm. 3, M. 2. The incisors are not preserved, but their alveoli indicate that they were much crowded, the outside one being placed almost directly in front of the canine, and the middle one pushed back considerably out of position... Continue reading book >>

Museum of Natural History, Vol. VI, On The Affinities of Leptarctus primus of Leidy American By: Jacob Lawson Wortman

In Museum of Natural History, Vol. VI, Jacob Lawson Wortman delves into the fascinating world of the Leptarctus primus, an ancient American mammal. Through meticulous research and detailed illustrations, Wortman provides a comprehensive analysis of the evolutionary affinities of this elusive creature.

The author's passion for paleontology shines through in this volume, as he expertly navigates the complexities of the Leptarctus primus's lineage and relationships within the animal kingdom. Wortman's writing is engaging and accessible, making this book a valuable resource for both scholars and casual readers interested in prehistoric life.

The illustrations accompanying Wortman's text are both beautiful and informative, helping to bring the Leptarctus primus to life on the page. The attention to detail in these drawings is truly impressive, adding an extra layer of depth to the book's exploration of this ancient mammal.

Overall, Museum of Natural History, Vol. VI is a must-read for anyone with an interest in paleontology or natural history. Wortman's expertise and enthusiasm make this volume a valuable addition to any library, offering a captivating glimpse into the evolutionary history of an intriguing and enigmatic creature.

First Page:

On the Affinities of Leptarctus primus of Leidy.

By J. L. WORTMAN.

AUTHOR'S EDITION, extracted from

BULLETIN OF THE AMERICAN MUSEUM OF NATURAL HISTORY,

VOL. VI, ARTICLE VIII, pp. 229 231.

New York, July 30, 1894.

Article VIII. ON THE AFFINITIES OF LEPTARCTUS PRIMUS OF LEIDY.

By J. L. Wortman.

Up to the present time but very little has been known of the existence of the peculiarly American family Procyonidæ in any deposits older than the very latest Quaternary. Leidy has described and figured[1] an isolated last upper tooth, from the Loup Fork deposits of Nebraska, under the name of Leptarctus primus , which has been referred to this family. The Museum Expedition of last year into this region was successful in obtaining additional material, which we provisionally refer to Leidy's species.

=Leptarctus primus= Leidy .

The specimen consists of the right ramus of the lower jaw, carrying the third and fourth premolars and the canine. The condyle is broken away, but the coronoid process and the angle are preserved. The specimen is from a young individual in which the last premolar had just cut the gum. The alveoli of all the other teeth are present and in a good state of preservation.

The dental formula is as follows: I. 3, C. 1, Pm. 3, M. 2. The incisors are not preserved, but their alveoli indicate that they were much crowded, the outside one being placed almost directly in front of the canine, and the middle one pushed back considerably out of position... Continue reading book >>

Book sections
Museum of Natural History, Vol. IX, Description of a New Vespertilionine Bat	Museum of Natural History, Vol. VI, On The Affinities of Leptarctus primus of Leidy American	Museum of Natural History, Volume 17, Birds from North Borneo
Museum of Natural History Volume 1, Pliocene and Pleistocene Records of Fossil Turtles

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Science

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