ELEPHANT REMAINS IN CANADA. 141 



length and is still not complete ; the point having been broken 

 away. The height from the under surface, to the most elevated 

 point in the bottom of the gutter, is four and three-fourths inches. 

 The slope of the bottom of the gutter forwards and downwards 

 forms an angle of 40°, with the plane of the under surface pre- 

 cisely as in the other specimen. But the slope backwards differs 

 in being about 80° instead of 60°. The greatest width of the 

 gutter is one and three-fourths inches. It is bordered on each side 

 by the remains of what was evidently an elevated margin similar to 

 that of the other specimen. The two anterior foramina remain ; their 

 height above the plane of the under side of the jaw is five inches 

 distance between them three and three-fourths inches. The 

 greatest width across the broken larger end of this bone is about 

 nine and a-half inches. 



Calling the first specimen described No. 1, and the latter No. 

 ■2, the difference in their proportions may be thus tabulated in 



decimal parts of an inch. 



No. 1 No. 2 



Length of underside of symphysis along the me- Inch. Inch. 



dian line including mandible, 5.50 6.25 



Length of mandible, 1 . 50 2.25 



Length exclusive of mandible, 4.00 4.00 



Most elevated point of the bottom of the gutter, . 3. 75 4. 75 



Greatest width of the gutter, 2.12 1.75 



Height of anterior mental foramina, 350 5.00 



Distance between them, 5.00 3.75 



The most important differences between the two specimens, so 

 far as they can be compared, are, that in No. 2, the symphysis is 

 nearly one third higher, or thicker, in the vertical direction, and 

 has a more abrupt slope posteriorly ; the gutter is one fourth nar- 

 rower ; and the mental foramina more elevated above the base and 

 not so far apart. 



These two specimens, at first sight, appeared to me to belong 

 to two distinct species, and as such I described them at the time, 

 the abstract of this paper was read befoi-e the Natural History 

 Society. But on further study I found that if the whole of the 

 elevated margin of the symphysial gutter of No. 1 were broken 

 away (as it is in No. 2,) the slope of the front part of the sym- 

 physis, forwards, would be precisely the same in both, (i. e. 40°) 

 when seen on a side view, as in fig. 5. This would greatly dimin- 

 ish the difference in the aspect of the two specimens. There 

 would yet remain, the greater vertical height of the symphysis 



