Davis—On the Fossil Fishes of the Chalk of Mount Lebanon. 617 
Rhinellus damoni, Davis. 
(Pl xxxvin., fig. 4.) 
Several specimens of a species of Rhinellus, which appear to be different 
from those hitherto described, have been found at Sahel Alma, and are now in 
the British Museum. They have a comparatively short fusiform body, and a very 
long snout; they vary from 6 to 7 inches in length. The one taken as a type 
is a beautifully preserved specimen from the Lewis Collection; it is 5-7 inches in 
length from the tip of the snout to the peduncle of the tail; the latter adds 
linch to the length. The head and snout occupy 3°5 inches, the remaining 
2-2 inches constituting the length of the body. In other specimens the length of 
the body more nearly approaches that of the head and snout. The greatest 
height in this specimen is 1-1 inch between the pectoral and ventral fins; from 
this point the height rapidly diminishes both anteriorly and posteriorly, the base 
of the tail being 0°5 of an inch. The dorsal fin is 1 inch behind the head to its 
anterior ray, the latter being also 1:4 of an inch from the base of the tail. 
The first rays of the pectoral and ventral fins are separated by 0-7 of an inch. 
The anal is 1-0 inch behind the ventral and 0°6 from the caudal. 
The head is comparatively small, the length of the jaws great ; behind the 
orbit it is 0°8 inch in height; the height rapidly decreases anteriorly, the con- 
tinuation of the jaws being long and slender. The orbit is small and circular, 
situated lower in the infra-orbital region than in the other species described. 
Between the orbit and the outer margin of the operculum is 0-7 inch. ‘The latter 
occupies 0:4 inch of this space; it is much higher than broad. The constituent 
parts of the operculum are not sufficiently well preserved for identification. The 
mandibles extend backwards 0:25 inch beyond the orbit ; they are armed with a 
long series of minute, recurved, sharply-pointed teeth; there are no large laniary 
teeth, as in R. ferox or R. laniatus. 
The vertebral column is comparatively small in diameter. There are forty-five 
vertebre. The neural and hemal spines are long and slender, bifurcated at the 
base, and with branching apophyses ; the ribs slightly stronger and longer. Inter- 
neural spines support the dorsal fin, and fine short interhemal spines support 
the anal fin. ; 
The unpaired fins are larger than those of some of the species of Rhinellus. 
The base of the dorsal fin extends 0-6 of an inch; it is composed of fourteen 
rays, the anterior ones reaching a length of 0-8 inch; they are strong and 
undivided at the base, but assume the usual form of subdivision towards their 
extremities. 
The anterior rays of the anal fin are situated 0°6 of an inch from the base 
of the tail; they are 0°3 inch in length; the succeeding ones, sixteen in number, 
