560 Davis— On the Fossil Fishes of the Chalk of Mount Lebanon. 
occupies 1°8 inch; it consists of thirty-two rays. The anal fin is 15 inch 
in front of the caudal; its base occupies half an inch, and consists of about a 
dozen rays, strong at the base, but imperfectly preserved towards the extremity. 
The caudal fin is well developed: there are twenty rays in each lobe; two or 
three short rays support those following, which are articulated at short intervals 
and frequently bifurcate; a number of rudimentary rays also support the external 
rays of each lobe. ; 
The pectoral fin is attached to the scapular arch immediately behind the 
operculum ; it is of moderate size, 1:1 inch in length, and composed of fourteen 
rays, which dichotomize at least three times, giving the extremity of the fin a 
finely divided filamentous appearance. The rays are only jointed near their 
extremities. The two pectoral fins, like the ventrals, are joined on the inferior 
margin of the body. The ventral fins are 2-7 inches behind the pectorals, 
and opposite to the posterior rays of the dorsal fin; they are smaller than the 
pectoral, and contain about eight rays. The ventral fin is separated by a distance 
of 2°3 inches from the anal. 
The scales are ovoid in outline, with radiating ridges; they are broader on 
the anterior part of the body, more elongated towards the caudal extremity. 
There are large masses of rounded granular substance spread over the 
abdominal region of the body; they do not extend beyond the outline of 
the fish. The granules average ‘05, or less, in diameter; the number is very 
great; they extend from the pectoral fins backwards to an inch beyond the 
ventral fins, and from the vertebral column to the lower margin of the body. 
Formation and Locality—Upper Cretaceous: Sahel Alma, Mount Lebanon. 
Lx coll—l. Damon, Esq., Weymouth. 
Osmeroides brevis, Davis. 
(PE xxxa., fig: I) 
The body, with its scaly covering, is well preserved in this specimen; the 
head is defective. The length of the body to the base of the caudal fin is 
3°5 inches; that of the head cannot be ascertained from this specimen; the 
tail is 1:8 inch from the peduncle to the extremity of the lower lobe. The 
greatest height of the body at the commencement of the dorsal fin is 1°5 inch; 
it gradually decreases to the tail, the height of the base being 0°6 of an inch. 
The species is remarkable for its short, stout, oval-shaped body. 
The head is crushed ; the external bones are thickly enamelled. The posterior 
margin of the operculum forms a semicircle. 
The vertebral column comprises fifty-three vertebree, and of these sixteen 
are caudal; their diameter is greater than the length; the articular surfaces, being 
