136 
actinopterygii. 
with opercular apparatus contained somewhat more than tb' e 
times, maximum depth of trunk about four times in tho t° 
length of the fish to the base of the caudal fin. Vertebrae about 
m number, half being caudal. Pectoral fin with about 12 st ° u 
raj s, articulated only quite at the extremity, and the length of 1 
foremost equalling half the depth of tho trunk at its insertion , 
pelvic fins about half as large as the pectorals, also with relative!) 
stout rays, arising much nearer to the anal than to the pe ct f r “ 
and opposed to tho anterior half of the dorsal ; dorsal fin with 
rays, slightly deeper than long, the distance between the occip 
and its origin somewhat less than that between the caudal fin an 
its termination ; anal fin arising a little in advance of the nn 
point between the pelvic and caudal fins, the total number of the rap 
emg ] 3, and the hinder 5 or 6 of these widely spaced along 
ventral border almost to the base of the caudal. Ventral ridge-so 
in number, gradually diminishing in size behind the pelvic n 
Form. cj* Loc. Upper Cretaceous : Mt,. Lebanon, Syria. Cretaceo 
stria ; Isle of Lesina, Dalmatia. 
4747. Fine specimen displaying all the principal character 
the genus and species, shown of the natural siz 
1 1. \ I. fig. 1 ; Ilakel, Mt. Lebanon. The fish is exhi ^ 
in direct side-view, with the check and upper jaw crU ^ a jj 
a little forwards. The form of the relatively s ” ^ 
cranium is distinct, and the delicate paraspbenoi^ 
gently bent upwards at the anterior end of the otic rc ° 
Remains of the large pterygo-quadrate arcade o ^ 
beneath the cranium, the articular end of the <] u ‘ 
('/»•) for the support of the mandible being directly m ^ 
the anterior margin of the orbit. Tho premasill® ( f '. q 
are shown, one being imperfect, the other 0,1 ^ 
impression ; and these are proved to be longer ^ iaI1 s jjja 
though small compared with the maxi Use. One 111, 
(apparently the left viewed from within) iscspecia ) ^ ^ 
preserved (mx.), exhibiting its convex oral bordei ^ 
remarkably large anterior inwardly-directed process*^ 
no teeth are distinctly seen, merely some fine 5ra,la , ve 
striations on the oral margin in its hinder halt. - __ 
the maxilla are remains of the two characteristic 
maxillary bones. The mandible (d.) is remarkably _ 
and deep, partly obscured by fragments of clu e ' P ^ 
scarcely more than the anterior third of its u lfi ,eI ,^ er0 - 
can have entered the cleft of the mouth. l° s 
