MEMOIRS
OF THE
CARNEGIE MUSEUM
VOL. II.
NOTES ON OSTEOLOGY OF BAPTANODON
With a Description of a New Species.
By Charles W. Gilmore
During the season of 1903, while in the service of the Carnegie Museum, the writer collected from the marine beds of the Jurassic in the Freeze Out Mountains in Carbon County, Wyoming, quite a complete Baptanodon skull (No. 1441[1]) and lower jaws associated with other parts of the skeleton.
Through the courtesy of the Director, Dr. W. J. Holland,[2] the writer was accorded the privilege of studying this specimen, thinking perhaps it would give some information regarding the obscure points in our knowledge of the anatomy of this interesting reptile.
The skeleton like nearly all of the American Jurassic Ichthyosaurians was enclosed in a very hard limestone concretion[3] much seamed and cracked by exposure to the elements.
Since publishing a paper on the Osteology of Baptanodon[4] additional discoveries have thrown new light on the structure of this animal. It thus becomes necessary
- ↑ Card catalogue number, Department of Vertebrate Fossils of the Carnegie Museum.
- ↑ My acknowledgments are especially due Dr. W. J. Holland, and I take this opportunity to express my appreciation of the many courtesies extended during the preparation of these notes. The text-figures were drawn by Mr. H. W. Hendley, of the U.S. National Museum, Washington, D.C.
- ↑ A recent letter from W. H. Reed, of the Museums of the University of Wyoming, informs me that during the past summer he collected a very complete Ichthyosaurian skeleton, which was quite free from the refractory matrix mentioned above. He regards this specimen as coming from a lower horizon than those found in the concretionary layer.
- ↑ Memoirs of the Carnegie Museum, Vol. II., No. 2, August, 1905.
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