. Annals of the Carnegie Museum. Carnegie Museum; Carnegie Museum of Natural History; Natural history. Peterson: A Fossil-Bearing Alluvial Deposit. 471 pebbles, and cobble-stones, some of considerable size, indicating the conditions usually found in the beds of streams. The writer is of the opinion that during the close of the Pleistocene, or later, there flowed through this valley a water-course of considerable size, which exca- vated Pleistocene remains from places where they had been originally imbedded, probably not far distant, and redeposited them in the spot where they are now found. Fr
. Annals of the Carnegie Museum. Carnegie Museum; Carnegie Museum of Natural History; Natural history. Peterson: A Fossil-Bearing Alluvial Deposit. 471 pebbles, and cobble-stones, some of considerable size, indicating the conditions usually found in the beds of streams. The writer is of the opinion that during the close of the Pleistocene, or later, there flowed through this valley a water-course of considerable size, which exca- vated Pleistocene remains from places where they had been originally imbedded, probably not far distant, and redeposited them in the spot where they are now found. Fragments of large shells were found immediately overlying the stratum containing the bones of vertebrates. Dr. A. E. Ortmann after examination decides them to be fragments of fluviatile moUusks. The finding of the tooth of a large crocodilian, described in this paper, furnishes further confirmation of the view that a stream of considerable size, perhaps of greater volume than the Holston River at present, once flowed here. The remains found in the opening at the edge of the sink-hole at "Well No. 69" are herewith listed, so far as it has been possible to determine, at least approximately, what they are. Class REPTILIA Order CROCODILIA. Genus Crocodilus Laurill. (?) sp. ind. A tooth (No. 3953, C. M. Cat. Vert. Foss.), which is shown in half the natural size in Fig. 3, was discovered among the scattered remains recovered at "Well No. ; It is 100 mm. in length, 30 mnx. in antero-posterior diameter at crown, and 24 mm. in transverse diam- eter at same point. The enamel has been more or less abraded, but nevertheless the tooth does not appear to have been transported very far, or much subjected to the action of running water. The apex of the crown, which is somewhat broken, ter- minates in a blunt rounded point; the shaft is a little curved. (Note. The tooth undoubtedly rep- resents a very large Crocodilian, but to which of the various extinct genera it is to b
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