HIPPOPOTAMUS. 145 



off, as are also the second and third premolars. The fourth is present 

 and barely touched at its apex, showing that the animal was adult, but 

 not old. This specimen is probably the most perfect that has been 

 found in the Sewalik hills, being deficient only in the ascending ramus 

 and the expanding disc at its base. The difference in the length of the 

 diastema between it and H. amphibius is very remarkable. Probably a 

 female. This specimen (from Conductor Dawe's Collection) was very 

 perfect and valuable, but it has been hardly dealt with in the Asiatic 

 Museum, most of the teeth having been broken off, and the fragments 

 searched for everywhere in vain. 



No. 208. — Exserted portion of the upper canine right side, showing 

 the disc of wear complete nearly to the tip. 



No. 209. — Inferior maxilla with the symphysial portion perfect on 

 both sides on the border of the incisive alveoli, showing part of the 

 canines in situ and the outer incisor on either side, the four inter- 

 mediate ones having dropped out ; the left horizontal ramus exhibiting 

 the broken off bodies of seven molars, the right side being shorter and 

 showing only the four premolars, also broken off. The alveoli of the 

 four middle incisors are much larger in diameter than in specimen 

 No. 207, indicating probably that the animal was a male. 



No. 210. — Mutilated fragment of lower jaw, comprising only the 

 symphysial part and a short portion of the right ramus ; the canine 

 alveoli on either side broken off; the two middle incisors very large, 

 being 1-25 inch in diameter. The alveoli of the next two incisors show 

 them to have been not more than half this diameter : the outer- 

 most on each side nearly as large as the middle ones ; probably an old 

 large sized male. The premolars very much worn. This specimen is 

 much weathered and greyish white in colour, althotigh thoroughly 

 mineralized and heavy. It differs very considerably in the large size 

 of the middle incisors from any other specimen in the collection, but 

 there is no mark or label to indicate whether it is from Ava or the 

 Sewalik hills. 



No. 212. — Lower jaw, right side, comprising the posterior half of 

 horizontal ramus, containing the last three molars, also the ascending 

 ramus with the coronoid jjrocess and condyle, nearly entire : the leafy 

 expansion below broken off; the last true molar shows a well-developed 

 talon behind : attached to sandstone matrix. 



No. 214. — Fragment comprising the lower jaw, both sides, at the 

 symphysis, showing the canines and six incisors ; at other parts much 

 mutilated ; belonged to a young or half-grown animal, with milk 

 dentition ? No mark or number. Can this be the Ava specimen from 

 Col. Burney. — Journ. As. Soc. vol. vi. p. 1009 ? 



No. 230. — Detached fragment upper maxilla, right side, containing 

 the alveoli of a canine and three incisors, and the three anterior pre- 

 molars broken off : the greater part of the canine is seen in the alveolus. 



No. 231 — Axis with odontoid process, broken off. 

 VOL. I. L 



