506 Davis—On the Fossil Fishes of the Chalk of Mount Lebanon. 
The larger proportion of the Teleostean fishes of the chalk of Lebanon are 
comprised in the first and fourth groups; others, like Pycnosterinx, probably 
find their nearest relationship with the Chromides in the second group. Many 
of the genera exhibit peculiar and aberrant features, which do not appear to 
be possessed by any living representatives; it is proposed to consider these in 
more or less detail under their more immediate or individual relationships. 
Order 1.—ACANTHOPTERYGII. 
“Part of the rays of the dorsal, anal, and ventral fins are not articulated, 
more or less pungent spines. The lower pharyngeals are generally separate. 
Air-bladder, if present, without pneumatic duct in the adult.” (Giinther.) 
Acanthopterygii perciformes, GUNTHER. 
‘‘Body more or less compressed, elevated or oblong, but not elongate; the 
vent is remote from the extremity of the tail, behind the ventral fins, if they 
are present. No prominent anal papilla; no superbranchial organ. Dorsal fin 
or fins occupying the greater portion of the back; spinous dorsal well-developed, 
generally with stiff spines of moderate extent, rather longer than, or as long as, 
the soft; the soft anal similar to the soft dorsal, of moderate extent, or rather 
short. Ventrals thoracic, with one spine and four or five rays.” 
This division is represented by only one genus, that of Pagellus. It includes 
two species, both somewhat doubtfully referred to this genus by Pictet. 
Family. SPARIDZ, 
Genus. Pagellus, CuviER. 
Pagellus leptosteus, AGASssiz. 
P. leptosteus. Agassiz, L., 1844. ‘Rech. sur les poiss. foss.,” vol. iv., p. 10 
and p. 154. 
P. leptosteus. Picrer and Humperr, 1866. ‘Nouv. rech. s. 1. poiss. foss. du 
Mont. Liban.,” p. 50. 
This species was described by Professor Agassiz; the original specimen he 
stated to be in the Museum at Zurich. Its origin was doubtful, but he had 
every reason to believe that it had come from Lebanon. Professor Pictet 
remarks, in the work cited above, that with the assistance of the administrators 
of the Museum at Zurich he sought for the specimen, but did not succeed in 
