HIPPOPOTAMUS. 143 



the orbits above the plain of the frontal ; both of which characters are 

 well shown when the skull is compared with Hipp. Palcp.indicus. 

 ' Nerbndda Cat.,' No. 17. The specimen is partly covered with hard 

 sandstone matrix. No mark, but inferred to be Sewalik, and probably 

 from Col. Colvin. 



No. 194. — Cranium broken across near the constriction in front of 

 the orbits, but very perfect behind, showing the zygomatic arches, 

 temporal fossEe, occiput, and condyles; the orbits a little broken in 

 their rim ; molar teeth protruded, but broken off. This must have 

 belonged to an animal of large size, as the distance between the outer 

 surface of the zygomatic arches is 13'7. inches. No mark or number, 

 but embedded in hard sandstone, and inferred to belong to the species, 

 from the length of the sagittal suture and the little prominence of the 

 orbits above the plain of the frontal. Inferred to be Sewalik. 



No. 196. — Like the last. Occipital portion more perfect, with edge 

 of crest presei-ved. The sagittal crest and both zygomatic arches 

 broken off. Eight orbit a little mutilated behind, but showing a large 

 lachrymal tuberosity. Left orbit nearly entire behind, showing the 

 whole of the rim. Four molars on the right side in the last stage of 

 detrition, showing the animal to have been extremely old. Covered 

 with sandstone matrix. 



No. 197. — Another, like the last ; mutilated in front of orbits, but 

 showing the tympanic fosaaj. The last true molar on either side is not 

 much emerged above the alveolus, and the sutures are open, showing 

 the animal to have been young. This specimen is more mutilated 

 about the orbits than the three preceding, and the temporal fossse are 

 filled with hard sandstone matrix. 



No. 198. — Another cranium, nearly like 194, with two zygomatic 

 arches and orbits. The last true molar on each side emerged but 

 unworn. All the cavities filled with hard sandstone matrix. A young 

 adult. 



No. 199. — Cranium mutilated at the muzzle in front of the second 

 premolar, and with the parietals and occiput obliquely broken off 

 towards the left side, so as to expose the cerebral cavity. Eight zygo- 

 matic arch and glenoid surface entire ; orbits a little damaged in the 

 rim ; nasal bones stove in by pressure. The teeth on either side are 

 all present, except the anterior premolar. The last true molar is in a 

 state of germ ; the penultimate shows well the basal cingulum of 

 enamel. The animal was a yomig adult. The cavities and fossse are 

 filled up with a hard gritty sandstone. This specimen shows the cha- 

 racters of the iipper molars better than any of the five preceding 

 specimens (194 to 198). 



No. 200. — Mutilated cranium, broken off behind, about the middle 

 of the temporal fossse, and in front, through the first true molar. Zygo- 

 matic arch present on the right side, with the greater portion of both 

 orbits. The three last molars on the left side present, and the two last 

 on the left ; the former well worn, showing the animal to have been 

 old. Hard sandstone filling the cavities and fossje. 



