DESCRIPTIONS OF SOME MAMMALIAN AND FISH REMAINS 

 FROM FLORIDA OF PROBABLY PLEISTOCENE AGE. 



Oliver P. Hay. 



Associate of the Carnegie Institution of Washington. 



There are few of our States which give promise of furnishing more 

 important contributions to our knowledge of the vertebrate animals 

 of the Pleistocene than Florida. Already the list of species has be- 

 come a long one and additions are constantly being made to it. 

 Materials belonging to five species are described below. Two of 

 these are beheved to be hitherto imnamed. 



ELEPHAS IMPERATOR Leidy. 



Plate 26, fig. 1. 



In 1889* Leidy described and figured a left ramus of the lower jaw 

 of an elephant which had been foimd by Mr. J. F. LeBaron, some- 

 where along Peace Creek, probably not far from Arcadia, and which 

 Leidy identified as belonging to ElejjJias columhi. Leidy' s figure 

 presents a view of the worn surface of the tooth, which he recognized 

 as being the hindermost molar. He stated that there were twelve 

 ridges present and that these appeared to be the complete number 

 entering into the constitution of the tooth. Eight of these were 

 said to occupy a space of 6.4 inches. Inasmuch as the tooth was 

 buried m the bone nearly to its summit, the thickness of the plates 

 was taken on the grinding surface. 



This jaw is in the United States National Museum, and has the 

 catalogue number 183. Recently the writer obtained permission to 

 expose the Ungual face of the tooth, and the result is shown on plate 

 26 (fig. 1). Near their bases the space occupied by four plates is 

 about 95 mm. There can be no doubt that the jaw belonged to an 

 individual of Elephas imperator. The normal number of plates in 

 the last tooth of E. columhi is about 24. Had there ever been so 

 many plates present the tooth would have had an enormous length. 

 With 18 plates it was sufficiently large. Certainly some plates, 

 about six, had been lost through usage. 



> Trans. Wagner Free Inst. Sci., vol. 2, p. 23, pi. 8, flg. 2. 



Proceedings u. S. National Museum, Vol. 56— No. 2291. 



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