18 
ACTTNOPTEETGII. 
and figured by Davis, Minute blunt teeth are observed 
in the mandible, and the foremost branchiostegal rays are 
very numerous and slender. The vertebrae cannot be 
counted in the abdominal region, but the caudals are about 
20 in number in advance of the hypural. Small inter¬ 
muscular bones are conspicuous in both regions. The 
dorsal fin is distinctly longer than deep, though imperfect; 
the anal fin exhibits 10 supports. Lewis Coll. 
P. 6024. A finer specimen of almost the same size, shown in PI. II. 
fig. 3, from the left lateral aspect. Traces of the minute 
blunt teeth are seen in the jaws, and the upper branchi¬ 
ostegal rays are shown to be comparatively short and 
broad. The characteristic vertebral centra are dis^Dlayed, 
nearly all slightly deeper than long, 20 or 21 belonging 
to the caudal region in advance of the hypural, and 35 
shown in the abdominal region behind the posterior 
margin of the operculum. The ribs and intermuscular 
bones are very slender; the expanded haemal and neural 
spines at tlie base of the caudal fin resemble those in the 
typical 0. lewesiensis. The dorsal fin is apparently nearly 
complete, exhibiting 17 or 18 supports and as many rays, 
the latter readily splitting into their two halves and very 
closely articulated distally; its extent equals the distance 
between it and the caudal fin. The small anal fin has 
at least 9 rays, which, like those of the dorsal, caudal, 
and pelvic fins, are very closely articulated distally. The 
exposed area of the scales is much deeper than bioad, 
and apparently smooth. 
Presented hy Prof. W. K. Parlcer, 1889. 
The following specimen seems to represent another species of 
Osmeroides (named Osmeroides niaxiraus by J. W. Davis, Trans. Poy. 
Dublin Soc. [2] vol. hi. 1887, p. 566), but is too imperfect to admit 
of formulating a specific diagnosis :— 
P. 4765. Distorted and crushed remains of a fish measuring about 
0*3 in length to the base of the caudal fin, described by 
Davis, loc. cit. ; Upper Cretaceous, Sahel Alma, Mount 
Lebanon. The most conspicuous feature is the rugose 
ornamentation of the facial and opercular bones. 
Lewis Coll. 
