54 ' THE CANADIAN NATURALIST. [VOi. ix. 



twenty inches. Depth of conical opening at base, twelve inches ; 

 circumference at base, nineteen and one-hali inches ; circumfer- 

 ence two feet from base, twenty- two inches. This horn curves 

 somewhat obliquely in about two-thirds of a circle, being more 

 oblique near the point, as if worn. A small portion of the base 

 appears to be wanting. 



Can we refer these remains, or any part of them, to any known 

 species of elephant ? In the ' Canadian Naturalist ' for the year 

 1863, page 135, there is a description by the late Mr. Billings, 

 of an elephant's lower jaw, found in a cutting on the Great 

 Western Railway near Hamilton. This jaw is referred to Eule- 

 phas Jachsoni of Briggs and Foster. 



Calling the jaw now under consideration, a. and that described 

 by Mr. Billings, b. we can tabulate the measurements of the jaws 

 as follows : 



A B 



Shortest line from posterior extremity of condyle ins. ins. 



to mandebular extremity 22^ 23 



Greatest width of jaw 25 22 



Length of symphysis along median line 5 5^ 



Width of symphysis 3 2^ 



The similarity of the dimensions of the two jaws thus shown, 

 leads us to regard the two as belongiog to the same species. 



The study of the molar before us, which is similar to those 

 contained in the jaw just m:ntioned, strengthens this belief. 

 Calling our molar A. and that described by Mr. Billings b. we 

 can tabulate dimensions as follows : 



A B 



inches. inches. 

 Greatest length of tooth 12 .18^ 



" width " 3J 3^ 



Length of crown 8| 11 



Number of plates in tooth 20 26 



In A. sixteen plates ^ve brought to view in a surface of seven 



and one-half inches. In B. nine vjorn plates occupy a length of 



four inches, thus giving in each case a little less than one-half 



inch to each plate ; a strong point in favor of the identity of 



species in the remains represented by the two molars. 



Among the remains for which the species E. Jachsoni was 

 proposed was a horn or tusk. A comparison of tliis with the 

 horn belonging to the W. Territory collection also favors the 

 view that the latter is referable to E. Jacksoni. Calling the 



