358 FAUNA ANTIQUA SIVALENSIS. 



correspond so exactly in every respect that no determinable difference 

 is perceivable. The skull is larger than that of a Gavial's head, which 

 measures 19 in. The specimen infiltrated with iron and very heavy. 



iVo. 652. Leptorhynchus. — Fragment of muzzle-portion of lower jaw 

 of an enormous-si^ed animal ; the left side showing the empty alveoli of 

 the five anterior teeth of very large sLze, broken off obliquely back- 

 wards ; the right side broken off" nearly opposite the termination of the 

 last alveolus on the left side and continued backwards, showing the 

 alveoh of five teeth, foiu: of which contain more or less of the teeth, its 

 anterior portion wanting. 



Dimensions. inctiea 



Length of fragment 13'5 



Width about middle ......... 9 '5 



Thickness .......... 4'6 



The alveoli of the two first teeth are very large ; the third and fourth 

 are still larger, the third showing a diameter of 1'8 in. by 1'4 in. ; the 

 sixth tooth is smaller, being 1 in. in diameter ; the seventh is 1"4 by 

 1-2 in. in diametei ; the eighth and ninth are smaller. 



Marked ' Fossil AUigator ' in J. Prinsep's hand- writing ; no other 

 mark or No. ; but vol. v. p. 180 of Jour. As. Soc. contains a notice of 

 a Crocodile of gigantic size with a cylindrical muzzle, and with teeth 

 projecting three inches above the jaw and one inch two lines in diameter. 



No. 653. Leptorhynchus. — Portion of lower jaw left side, comprising 

 a part of the horizontal ramus behind the symphysis, and containing 

 the alveoli of two teeth. The suture of the opercular bone is visible ; 

 alveoli of enormous size, the anterior being about 1 in. 5 lines in 



diameter. 



Inches 

 Height of jaw taken opposite last tooth ...... 6-7 



Thickness of ditto .......... 6"6 



Length of fragment 10 "5 



Probably belongs to an animal of corresponding size with 652, but 

 it differs in weathering and colour of surface. 



