404 Dr. A. Smith Woodward—Fossil Fishes from Egypt. 
jaws and the tail of the new fossil are proved to agree exactly with 
those of Solea itself, while the condition of the pelvic fins is uncertain, 
it may best be placed in this genus. It is distinguished from all the 
known species by its shape and by the number of its caudal vertebrae 
and anal fin-rays. It may therefore be named S. cocenica in allusion 
to the fact that it is the first example of its genus to be obtained from 
a formation so old as the Eocene. 
2. Mytomyrvs FRANGENS, gen. et sp. nov. Pl. XXXIII, 
Figs. 2, 2a-c. 
An eel measuring about 31cm. in total length is well displayed 
from the right side, and lacks only the anterior part of the snout 
(Fig. 2). The length of the head with opercular apparatus equals 
about twice the maximum depth of the trunk, and is contained six 
times in the total length of the fish. 
The crushed hinder half of the skull (Fig. 2a) shows that it is of 
the usual elongated, narrow, and depressed shape, with a prominent 
postfrontal bone (pif.); and in the middle of both upper and lower 
jaws there is a single regular series of very large grinding teeth, 
which are enamelled, smooth, rather deep, and flattened at the apex. 
A more slender blunt tooth is seen near the symphysis of the mandible. 
The thin smooth operculum (op.) exhibits a horizontal strengthening 
ridge on its inner face. Traces of very slender branchiostegal rays 
(dr.), not curving upwards round the operculum, are seen below. 
There are thirty-three vertebre in the abdominal region, with con- 
stricted centra which are strengthened by a few slight longitudinal 
ridges. In about the twelve foremost vertebrae the neural spines (7.) 
are much expanded, the two first also comparatively deep, but further 
back they soon become slender rods lke those of the caudal region. 
The broad triangular transverse processes are preserved both in some 
of the foremost and five of the hindmost abdominal vertebre, and 
there are also some traces of short delicate ribs. There are about 
sixty-seven caudal vertebrae, with similar but more elongated centra, 
and very delicate neural and hemal spines. The terminal vertebra 
bears a small fan-shaped expansion, suggestive of a hypural bone. 
In the pectoral arch the supraclavicle (sc/.) is a relatively long and 
slender bone, nearly reaching the occiput; and the almost equally 
slender clavicle (¢l.) bears in its upper half a delicate and much- 
expanded scapular arch, of which the coracoid (co.) forms the largest 
share. Of the pectoral fin only an obscure impression of the base 
is shown. The median fins are remarkably deep, continuous round 
the tail, with all the rays subdivided and distantly articulated in their 
distal half. The dorsal fin arises immediately above the scapular arch 
and comprises about ninety rays. The expansion at the end of the 
terminal caudal vertebra bears eight or nine comparatively crowded 
rays. The anal fin, which extends as far forward as the end of the 
abdominal region, consists of about sixty-five rays. The median fin 
must have been continuous round the end of the tail, but the space 
separating the terminal group of crowded rays from the last dorsaland . 
anal rays respectively is greater than that between any two other 
fin-rays (Fig. 26). There are no traces of scales in the lower part of 
