NATURAL SCIENCES OF PHILADELPHIA. 



121 



Remarks on Elephant Remains. Prof. Leidy called attention 

 to the fragment of a fossil elephant molar tooth presented this 

 evening by Messrs. W. W. Jefferis, and J. B. Dillingham. 



The specimen consisted of four dental plates, and is quite friable. 

 Adherent to it are a number of crystals of vivianite and also sonic 

 of the same material in pulverulent form. It was found resting 

 on the Kaolin bed, about eight feet from the surface of the Ameri- 

 can Kaolin Works, near Chadd's Ford, Delaware Co., Pa. 



Prof. Leidy also exhibited drawings of an elephant tooth which 

 had been submitted to his inspection by Dr. E. A. Wood, of Pitts- 

 burg. The specimen was dredged at the confluence of the Monon- 

 gahela and Alleghany rivers. The tooth, an upper molar, is well 

 preserved and nearly entire. Weight 9 lbs. 15^ ounces. The tritu- 

 rating surface extends about half the fore and aft measurement 

 of the tooth, and exhibits a dozen double dentinal bars. 



Another drawing, submitted Lry Prof. E. 0. Hovey, represents 

 a hugh elephant tooth, from California, and now preserved in the 

 cabinet of Wabash College, Indiana. The specimen appears to 

 be a last molar, and weighs 21^ lbs. Towards its backpart the 

 tooth is 13 inches long. The triturating surface, 7-| inches long, 

 presents eleven double dentinal plates. 



All the specimens are supposed to belong to the extinct Ameri- 

 can Elephant, Elephas americanus. 



Remarks on Stephanoceros C. Xewlin Peirce 



drawings of a specimen of an aquatic animal, belong 

 genus Stephanoceros, which had been recently 

 observed by him. In doing so, he said he 

 was induced to bring it before the Academy 

 because it was, he believed, rarely met with in 

 this country, and had not been previousl} 7 here 

 described. 



In its main characteristics, such as spiral 

 carapace or case, five tentacle-like lobes armed 

 with cilia, or, more properly, seta?, eye-spots, 

 jaws, stomach, etc., it corresponds with the 

 description given by Mr. C. Cubitt in his 

 paper entitled "Observations on the Economy 

 of Stephanoceros," in the " Monthly Micro- 

 scopical Journal," vol. iii., 1870, p. 242; but 

 in addition to that very full sketch of this in- 

 teresting object, there were some points of 

 interest not there recorded. First was the 

 great length of seta? or bristles projecting 

 from the ends of the tentacles (only to be 

 seen by especial care in focalizing with the 

 lens), these overlapping each other formed a 

 network in which were entrapped Paramecia 

 of various sizes, as many as forty having been 

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ex 



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hibited 

 to the 



