276 MR. BUSK ON THE REMAINS OF 
2. Upper Jaw. 
The collection affords two fragments of the premaxillary bone, and none apparently 
of any other part of the upper jaw. 
1. One of these is a fragment rather more than 3 inches long, and about 14 wide at 
the lower end, evidently (from the texture of the bone) of a young animal, and from its 
dimensions not improbably belonging to the same individual, or to one of the same age 
and size, as that whose exoccipital is represented in Pl. XLIV. fig. 4. It is a portion 
of the right premaxillary; and on the inner side the socket of the permanent tusk is 
exposed, in the form of a sulcus about 2 inches long, and about 0'"5 in diameter. 
2. The second specimen of the same bone is represented in PI. LII. fig. 46, with what 
appears to be the point of a very young permanent tusk én sitw. It should be observed, 
however, that there is no reason, so far as I know, to believe that the tooth and bone 
were actually found in conjunction. The former seems to have been fitted and cemented 
into its place by Dr. Falconer ; it is therefore impossible to say whether it really belonged 
to the bone or not. The fragment which belongs to the left side is of dense and close 
texture; and the bone, to all appearance, is not that of a young animal, although un- 
doubtedly one of very small size. I should be inclined to refer it to E. falconeri; and 
in colour and condition it exactly accords with some of the other bones already referred 
to that species. 
The portion of the tusk attached to it is nearly 2 inches long, and about 0-4 in 
diameter. Its surface is marked by well-pronounced parallel ridges; and the exposed 
part is partially coated with a thin layer of very hard semitransparent substance of ferru- 
ginous colour, and apparently of the nature of enamel. At one part of the circumference 
this enamel crust, if such it be, terminates naturally in a very thin edge. The greater 
part has been scaled off, and at the apex it, as well as the ivory below it, has been worn 
away by attrition; but whether during life or not is uncertain, though, from the obliquity 
and smoothness of the worn apex, the former is by far the more probable. I am not 
aware that the existence of enamel on the permanent incisor of the Elephant has ever 
before been noticed, although, as is well known, the deciduous tusk always has a toler- 
ably thick cap of that substance; so that its occurrence upon what is undoubtedly the 
permanent incisor, in the present case, is worthy of note. 
3. Lower Jaw. 
1. The collection contains seven or eight fragments of the lower jaw. One of these, 
consisting of the entire symphysis, has been already described as belonging to a mature 
animal of considerable size. A second fragment, apparently belonging to the same 
species, though of younger age, is a portion (about 5 inches long) of the anterior part of 
the right ramus. The whole of the outer table is broken away, and the exposed surface 
is somewhat worn; but on it may be perceived the very shallow remains of the alveolus 
of the 2nd milk-molar, and further back a smooth depression, probably an indication of 
