141—54 CRANIA OP RUMINANTS PROM THE INDIAN TERTIARIES. 
Genus : PERIBOS, n. gen. noUs. 
The name of this new genus, or, perhaps, snb-genus, inadvertently appeared 
without any descriptive notice in my paper on Indian Tertiary Mammalia published 
in the “Records of the Geological Smwey of India.” ^ 
The genus is founded upon the single cranium described below, and from cranial 
characters, may be defined as follows : — Prontals fl:at, and broader than long ; horn- 
cores pyriform in cross section, short and curved, closely approximated at their 
bases, and situated on a ridge of the frontals, which is somewhat below the plane 
of the occiput ; the true occipital surface bounded by its crest, and the latter 
approximated to the horn-cores ; teeth and basi-occipital of the Bovine type. 
Peribos occipitalis, Falc. sp. (?). Pis. 20 and 21, f. 2. 
The doubt as to the original application of the above specific name to the 
figured cranium has been already noticed in the introduction, and need not be 
repeated here. The specimen is in the Siwalik collection of the Asiatic Society of 
Bengal; it is numbered in the Catalogue of the Society’s collection S 562, and has 
been there described by Dr. Ealconer ; it was obtained from the Siwaliks of Gana- 
wur, and has been referred to in the “Journal of the Asiatic Society of Bengal.”*^ 
Dr. Ealconer’s description of the specimen is as follows : — 
“ Eine skull of a Bovine Buminant, nearly perfect from the occiput to the 
diastema, showing the zygomatic arches, temporal fossae, and the wEole of the 
sj)heno-palatine region, together with two lines of molars in situ ; the crowns of 
those on the right side broken off ; the three posterior molars on the left side nearly 
entire ; a horn-core is present on the left side, absent on the right, through a fracture 
which has carried it off below the base. The cranial part of the skull differs 
remarkably from all known Bovine Bmninants in this respect, that the occipital 
bone appears to terminate at the occipital crest, or close to it, and that no part of 
the parietals enters into the occipital plane. 
“ The horns are pyriform in section, with a very sharp edge behind, and a 
broad surface in front ; they are closely approximated on the brow, and start 
upwards and outwards, but curve forwards towards their tip. The plane of the 
frontals is flat between the commencement of the horns, and then descends in a 
sudden curve between the horn-cores to meet the plane of the occipital at an obtuse 
angle. The occipital crest is very prominent ; orbital rim also prominent ; the 
lachrymal bones present rough tuberosities at the orbital margins, as in the Bovine 
group ; there is also no lachrymal fissure ; the two supra-orbital foramina large. 
> Vol. IX, p. 90. 
2 Vol. V, p. 184. 
