Davis—On the Fossil Fishes of the Chaik of Mount Lebanon. 593 
visible, apparently all attached to one side. The maxille are large, and the gape 
somewhat extended. The under surface of the lower jaw is exposed; teeth, 
about 1°5 inch in length, pointed, and slightly curved, are exposed in connexion 
with the lower jaw, but cannot be distinguished in the upper one. 
This species is distinguished from the others of the same genus by its body 
being much shorter. The large and powerful pectoral fins, the form of the head, 
and character of the teeth, render its transference from the genus Clupea to that 
of Spaniodon, without doubt, correct. 
Formation and Locality—Upper Cretaceous: Sahel Alma, Mount Lebanon. 
Ez coll James W. Davis, Chevinedge, Halifax. 
Genus. Lewisia. Davis. 
Head moderately large; orbit superior, median; gape wide; maxilla and 
mandible long, armed with large, conical, curved teeth; operculum large; 
vertebral column somewhat slender, furnished with numerous spinous apophyses 
‘and ribs. Dorsal fins small, situated on the posterior portion of the dorsal 
surface; anal also small and very near caudal; caudal large, deeply bilobate ; 
pectoral fins abdominal immediately behind the opercula; ventrals abdominal, 
behind the dorsal, and little removed from the anal. 
The fishes from which it is proposed to form the genus Lewisia combine 
several of the characters of the Halecoidei, but appear to be distinguished by 
peculiarities in structure which removes them from each of the already constituted 
genera. The form of the head bears some resemblance to that of Eurypholis; 
the gape is very wide; the jaws are long, and armed with large teeth, probably 
larger but less numerous than those of Eurypholis. The vertebral column, ribs, 
and apophyses closely resemble those of Clupea or Spaniodon, but the position of 
the dorsal, ventral, and anal fins are quite unlike those genera; they are small 
and striated quite on the caudal part of the body. The caudal fin is very large, 
and compensates to some extent for the sparcity of the others. 
The name of the genus is chosen to express, in some slight degree, the 
indebtedness of palzontologists to the persistent and painstaking labours of 
Professor Lewis, whilst resident at Beyrout, in collecting, at no small sacrifice, 
so many of the beautiful and rare specimens figured in this memoir. 
Lewisia ovalis, Davis. 
(er oom, fie, 6.) 
The outline of Lewisia ovalis forms a tolerably perfect oval, the length of the 
body, exclusive of the tail, being 5-0 inches, and the height 2-0 inches, the least 
