204 DR. EMBLETON AND ME. ATTHEY ON THE 



level. At the beginning of the posterior third of this ridge there 

 is an oblique fracture through the presphenoidal part ; in front 

 of the fracture the ridge tapers gradually to a point, which is 

 probably the anterior end of the median part of the vomer, and 

 where it is joined by the vomerine palate-plates. 



The teeth are all broken of! at about the level of the alveoli, 

 except four on the right side. The whole surface of the palate 

 between the palate-plates of the maxillaries, namely, the palate- 

 plates of the palate-bones and of the vomers, are covered all 

 over with small, somewhat pointed, and thickly set granulations ; 

 the vomerine and premaxillary divisions of the palate are the 

 strongest parts of the upper jaw. There is no anterior palatine 

 foramen. 



The malar or zygomatic arches are open and wide, being about 

 four inches long by two inches at the widest part, and of an 

 elongated ovoid shape, their apices pointing forwards. 



The posterior nares are placed far back, at the posterior part 

 of the pterygoids, and close together, but distinct from each 

 other. 



Behind the nares are two bony projections, apparently from 

 the basisphenoid ; this bone is difficult to define, but is attached 

 to the apex of the basioccipitai behind. This is of a triangular 

 form ; and its forward-pointing apex is wedged in between the 

 converging posterior lateral projections of the cranium, bordered 

 by the ossa quadrata. At its base is seen the cup-shaped cavity 

 for articulation with the body of the atlas. 



Individual bones. — The premaxillaries are well preserved, and 

 are firmly united by the median suture ; their alveolar border or 

 arch is somewhat elevated above their palate-plates, and contains 

 four teeth on each side of the symphysis ; all are broken off on a 

 level with the alveoli. 



In another specimen of Loxomma in Mr. Atthey's possession 

 there are five teeth on the right and six on the left side. 



The last two teeth at the extremities of the premaxillary arch 

 are only half the size of the others, and are placed nearer to each 

 other than the rest are. 



Each dental interspace is fully occupied by a wide and deep 



