SKULL AND OTHER BONES OF LOXOMMA ALLMANNT. 207 



teeth have disappeared. It is highly probable that the teeth 

 had originally been more numerous ; for in another specimen, in 

 Mr. Atthey's collection, of the skull of Loxomma, in which the 

 maxilla measured in length very nearly the same as that of the 

 specimen before us, there were twenty -four teeth easily counted. 



The inner edge of the alveolar border towards the front is de- 

 pressed for the space of one inch and three-quarters below the 

 level of the outer. 



The palate-plates of the maxillaries are about six inches and 

 a half in length, with an average width of one inch, and extend 

 from the aperture in the jaw and the vomerine plates backwards 

 to articulate with the malars and ectopterygoids. Each is 

 transversely divided into two, if not three, pieces, there being 

 an undoubted suture at the distance of two inches from the 

 anterior end of the bone, and a doubtful one at nearly the same 

 distance further back ; the supposed third piece bears no tooth. 



The first piece of the palate-plate, a little broader than the 

 others, lies between the alveolar border externally and the 

 vomers and palate-bones internally ; in front it forms the pos- 

 terior margin of the aperture in the jaw ; and immediately be- 

 hind this edge occurs a large round depression, behind which 

 again is a tusk, but one of smaller diameter than the depression ; 

 the tusk is only three-quarters of an inch in diameter, and its 

 outline is more circular than that of the vomerine tusk. 



The second piece is bounded laterally by the alveolar border 

 and by the palate-bones, and bears, at a distance of one inch and 

 a quarter behind the last-named tusk, another, which has a dia- 

 meter of only half an inch ; and behind this is a depression much 

 larger than the tusk itself. 



The third piece, indistinctly divided from the second, is bounded 

 laterally by the alveolar border and the malar externally and the 

 palate and ectopterygoid internally ; and its posterior extremity 

 forms a small portion of the anterior boundary of the zygomatic 

 arch. 



The palate-bones are long and rather broad, occupying a large 

 space on each side of the median line; together they have an 

 ovate-lanceolate form, pointed in front and inclosed on each side 



