510 Davis—On the Fossil Fishes of the Chalk of Mount Lebanon 
Pseudoberyx botte, Picrrr and Humperr. 
P. bottz. P. and H., 1866. ‘Nouv. rech. sur les poissons fossiles,” p. 34, 
Plots, He. a 
In addition to the details of the description of this species given by Pictet 
and Humbert, examples from the collection made by Professor Lewis afford 
evidence of spinous rays, two in number, attached to the dorsal fin, and a single 
strong spine in front of the ventral fin. The pectoral fins are medium size, 
attached slightly below the median line of the body, and consisting of ten to 
twelve rays. 
The scales are large, posterior margin circular and minutely denticulated. 
There are eight in a transverse row in front of the dorsal fin, and on the lateral 
line, between the head and tail, twenty-eight scales. In proportion to those 
of Pseudoberyx syriacus the scales are considerably larger and fewer in number, 
confirming the determination of the authors cited above that the species were 
not the same. 
Formation and Locality—Hard chalk: Hakel, Mount Lebanon. 
Ex coll.—Museum at Geneva (type), not rare. 
Pseudoberyx grandis, Davis. 
(Pl. xxviu., fig. 4.) 
Compared with the species of this genus previously described from Mount 
Lebanon, viz. P. syriacus, Pictet and Humbert, and P. botte, P. and H., 
this one is large. Its form is an elongated oval, somewhat attenuated towards 
the tail. The snout and anterior portion of the head are not well preserved, 
and their position relatively to the body is somewhat displaced, so that the orbit 
has been pressed under the surface exposed. The length of the fish, as preserved, 
is 6°5 inches, and of this the tail absorbs 1°5 inch and the head 1°8 inch. 
The greatest height is in front of the dorsal fin, 2°2 inches, diminishing back- 
wards to the peduncle of the tail, which is 0°8 inch in height. The opercular 
bones are high and narrow. The operculum is triangular; the anterior exposed 
margin is nearly straight, with the infero-posterior margin it forms an obtuse 
angle; its surface is vertically striated on the lower portion, radiating to a hori- 
zontal direction on the upper. The pre-operculum is long, with a slight concave 
curvature of the anterior surface, and increasing in width downwards. 
The vertebral column is massive, composed of twenty-nine vertebre, fourteen 
of which are caudal. The ribs and apophyses are strong, and extend with 
backward curvature nearly to the margin of the body. The interspinous bones 
supporting the dorsal and anal fins are strong, and overlap the apophyses to 
a considerable extent. The terminal caudal vertebra is widely expanded and 
flat; radiating from it are the primary rays of the caudal fin. 
