.
Lacerta gangetica, Gm. Syst. Nat. i. p. 1057.
Crocodilus longirostris, Schneid. Hist. Amph. p. 160. Cuv. Oss. Foss. v. pt. 2. p. 60. pI. 1. figs. 2 & 10, &; pI. 2. fig. 11 (head and skull).
- tenuirostris, Cuv. 1. c. p. 62. pI. 1. figs. 1 & 11, & pI. 2. fig. 12.
The length of the snout equals that of nine or ten of the dorsal shields. The upper jaw with twenty-seven slender and slightly curved teeth, the lower with twenty-six. The strongest of all the teeth are the two anterior lateral ones of the upper jaw, and those of the first, second, and fourth pairs of the lower jaw. There is a transverse series of four or six smallish shields at a short distance behind the occiput; another pair of very small shields occupies the space between that series and the anterior dorsal shields. The dorsal shields commence in the middle of the length of the neck, and form twenty-two transverse rows to the root of the tail. The first transverse row is composed of two shields only, whilst the two following have a small additional shield on each side; in the middle of the back each transverse row is composed of six shields-four large ones and two small lateral ones; each shield is keeled.

Old male specimens have a large cartilaginous hump on the extremity of the snout*, perforated by the nostrils and containing a small cavity for the reception of air, so that the males are enabled to remain under water for a longer time than the females.
The Gavial attains to a length of 20 feet.