228—20 INDIAN TEETIARY AND POST-TERTIARY VERTEBRATA. 
third tooth, instead of at the second, as in G. gangeticus (pi. XXX. fig. 4a.) and G. 
curvirostris (pi. XXXI. fig. 2a). Some distance behind the third tooth there is a 
sharp constriction of the rostrum, and a well-marked notch for the fourth mandibular 
tooth. Posteriorly to the notch the alveoli of four maxillary teeth remain on the 
left side ; all these teeth are much smaller than the premaxillary teeth, and increase 
regularly in size from before backwards. They are situated internally to the outer 
half of the second premaxillary tooth, and the series appears to have diverged 
posteriorly ; each alveolus is nearly circular, and is separated from the neighbouring 
one by an interval of about one-third its diameter. A row of large vascular 
foramina runs at some distance to the inner side of the dental alveoli. On the 
facial aspect (fig. 1) the lateral expansion of the premaxillje is well shown; the 
anterior narial aperture is not unlike that of G. gangeticus, but its lateral borders are 
raised into distinct ridges. In advance of the nares the premaxillse are mesially 
hollowed ; while posteriorly the profile of the rostrum appears to be straight ; its 
width and height having nearly the same relative proportions as in G. gangeticus. 
The surface of the cranial bones appears slightly more rugose than in the latter ; 
and the extremity of the premaxillse is perforated by a number of large-sized vascular 
foramina. The extreme breadth across the expanded portion of the premaxillse is 
9^ inches, and at the notch for the fourth mandibular tooth 7^ inches. In a 
cranium of G. gharialis measuring 31 inches from the occipital condyle to the tip of 
the premaxillse the corresponding dimensions are respectively 4 and 2 ‘3 inches. 
The specimen represented from the palatal and lateral aspects in plate XXXIII. 
figs. 2, 2a, was obtained from the lower Siwaliks of Sehwan in Sind, and presented to 
the Asiatic Society of Bengal by Dr. Young sometime previous to 1859 ; it is noticed 
by Falconer on page 258 (No. 14) of his “ Catalogue of Fossil Vertebrata of the 
Asiatic Society of Bengal.” This specimen is part of the cranial rostrum of a 
gharialoid crocodile, showing the alveoli of six cheek-teeth ; at the anterior end there 
is seen the posterior termination of the premaxillae, from which it is evident that it 
corresponds in relative position with the hinder portion of the specimen represented 
in fig. la. From the locality whence it was obtained and its agreement in form, 
there can be little doubt that it belonged to a smaller individual of the same species 
as the latter. The dental alveoli are sub-circular, and placed near to one another ; 
distinct pits occur between the alveoli, placed somewhat internally to the median line 
of the latter, and much less deep than in Tomistoma schlegeli. The profile (fig. 3a) is 
nearly straight, and the form of the facial surface is the same as in the type specimen. 
Unfortunately the condition of the fragment is such as to prevent the certain deter- 
mination of the relations of the nasals to the premaxillae, although it is probable 
that they did not articulate with one another. The position of the interdental pits 
is such as to indicate that the maxillary and mandibular teeth interlocked. 
Teeth . — The bases of the premaxillary teeth still remaining in the type specimen 
show a slight antero-posterior compression. The crown of a probably upper tooth 
(which has lost the greater part of its enamel) represented in plate XXXIII. fig. 4 
