136 DR. J. E. GRAY’S SYNOPSIS OF THE SPECIES 
The palatal bone in all the genera is truncated or rounded in front, except in 
Mecistops, where it is narrow, short, and acute in front. 
The skulls of the genera Bombifrons, Oopholis, and Moliniaare easily distinguished in 
the young state,—the face of Oopholis being much longer and narrower than that of 
Bombifrons, and that of Molinia is longer and narrower than that of Oopholis. The 
measurements following are for three skulls which appear to be from animals nearly of the 
state of growth, same in inches and lines :— 
Bombifrons. Oopholis. Molinia. 
in. lines. in. _ lines. in. _ lines. 
Length of the skull, entire ...........--- 4 8 5 8 6 
Length of face to front of orbit.........+.+.- 2 8 3 6 4 4 
Length of forehead to front of orbit .......... 2 0 2 1 2 4 
Length = palate from condyle to front end of } oe 3 4 3 10 
MIEN) GasAcoss casa adonaegobden eS 
Length of middle suture of maxilla .......... 1 2 1 14 1 7 
Length of middle suture of intermaxilla ...... 0 9 1 3 1 6 
MAGE OCA aqaotocons Momo OMA Sone 2 6 2 5 2. 103 
Width at hinder contraction of beak.......... 1 6 1 4 il 4} 
Wad the atanopehiserencte wires sretcr trary sete torar 0 9 0 9 0 9 
The dorsal scales present considerable variations in different specimens from the same 
locality ; but, allowing for such variations, the genera cuay be arranged thus :— 
1. The dorsal scales nearly uniformly keeled, in four or six longitudinal series; the 
outer series ovate-elongate. Oopholis. : 
2. The dorsal scales nearly uniformly keeled, quadrilateral, as broad as-long. Croco- 
dilus, Palinia, Molinia, and Mecistops. 
3. The dorsal scales quadrilateral, as broad as long; the vertebral series scarcely 
keeled, the lateral series irregular and keeled. Halcrosia and Molinia. 
The eyelid of the genus Halcrosia is thickened with hard bony plates, as in 
some of the Alligators, with which it also agrees in the external form of the head and 
the disposition of the nuchal shield. In all the other genera it is thin and mem- 
branaceous. 
Synopsis of Genera. 
I. Cervical disk rhombic, separated from the dorsal shield. Normal Crocodiles. 
A. Nuchal scutella none. Dorsal plates ovate-elongate, in four or six longitudinal 
series. Estuarine Crocodiles. 
1. Oopuoxis. Asia and North Australia. 
B. Nuchal plates four, in a transverse series. Dorsal plates as broad as long, 
square. ¥Fluyiatile Crocodiles. 
