CliOCODlLUS SP.— TOMISTOMA GAVIALOIDES. 
267 
Another fragment shows tliat not only the ninth and tenth, but also the eleventh 
tooth was enlarged. 
R. 3344. Anterior portion of left ramus oL‘ mandible. The total length of the specimen is 17 cm., 
the length of the symphysis about (i'5 cm. 
R. 3197. Fragment of right ramus of mandible with the remains of three teeth. 
Genus TOMISTOMA, S. Miiller. 
[Arch. f. Nat. (184G) p. 122.] 
Tomistoma gavialoides, Andrews. 
[Plate XXIII. tigs. 3, 3 a.] 
1905. Tomistoma gavialoides, C. W. Andrews, Geol. Mag. [5] vol. ii. p. 483. 
Type Specimen. — A nearly complete skull, wanting only the posterior portion of the 
])alate and the end of the rostrum (PL XXIII. figs. 3, 3 a) ; Geological Museum, 
Cairo. 
This species is in many respects intermediate between Gliarialis and Tomistoma. 
The roof of the skull is wide, the supratemporal openings large. The nasals extend 
forwards between the facial processes of the premaxilhe ; the premaxillary expansion 
is less than in Gharialis. There are 22-23 teeth on each side. The length of the 
type skull from occij)ital condyle to tip of snout is 64 cm. 
Form. & Loc. — Fluvio-marine beds (Upper Eocene) : north of Birket-el-Quruu. 
Eemains of this species are fairly abundant, though for the most part fragmentary. 
I'he best specimen found by Mr. Beadnell is the nearly complete skull, which is figured 
and is to be regarded as the type. In its general form, as well as in many of the details 
of its structure, this skull is intermediate between those of Tomistoma schlegeli and 
Gharialis gangeticas *, resembling the latter in so many points that, were it not 
for the facts that the nasals are in contact with the premaxillae and that the number 
of teeth is small, this species might almost as well be referred to Gharialis as to 
Tomistoma. 
The upper part of the occipital surface is almost exactly as in Gharialis, a small 
wedge-shaped process of the supraoccipital appearing on the skull-roof, interposed 
between the posterior ends of the parietals and forming a backwardly projecting 
* For a comparison of the skulls in these two species, see Ivoken, “ Thoracosaurus macrorhynclius, Bl., 
aus der Tuffkreide von Maastricht,” Zeitschr. deutsch. geol. Gesell. vol. 40 (1888) p. 754. 
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