CHIROCENTRIDiE. 
105 
Ichthyodectes libanicus (Pictet & Humbert). 
(?) 1849. Clupea gigantea, J. J. Heckel, in Russegger’s Reisen, vol. ii. 
pt. iii. p. 345. [Portion of abdominal region.] 
1866. Chirocentrites libanicus, Pictet & Humbert, Nouv. Rech. Poiss. 
Foss. Mt. Liban, p. 88, pi. xiii. 
1887. Chirocentrites libanicus, J. W. Davis, Trans. Roy. Dublin Soc. 
[2] vol. iii. p. 585. 
Type. Anterior portion of fish ; Genova Museum. 
A species attaining a length of about 0'6, known by the greator 
part of the fish, differing from Chirocentrites and resembling Ichthy- 
odectes in the characters of the doutition. Maximum depth of 
trunk equalling somewhat more than one quarter of its length 
from the pectoral arch to the base of the caudal fin. Oral border 
of maxilla gently sinuous, concave in its anterior half ; teeth of 
maxilla and dentary approximately equal in size, all very slender, 
straight, and closely arranged ; premaxillary teeth somewhat 
stouter and more sharply pointed, the foremost larger than the 
others. Other characters as in Chirocentrites coroninii. 
Form. Sf Loc. Upper Cretaceous : Mount Lebanon, Syria. 
39239 . Imperfect large fish, in counterpart, wanting nearly the 
whole of the head and showing only fragments of the 
paired fins ; Hakcl. Part of the cranium is exposed from 
beneath. Ono side of this fossil seems to be described by 
Davis, loc. cit. p. 586 ; the other shows remains of about 
60 vertebrae. Tristram Coll. 
39238 . More imperfect remains of a smaller fish ; ITakel. The 
anterior half of the maxilla is well shown, deepened at 
its robust palatine articulation. Beneath it is part of 
the mandible, half only in impression, with traces of 
teeth like those of the maxilla and possibly (though 
doubtfully) with a few slightly larger teeth. Very 
slender branehiostegal rays are also seen beneath the 
remains of the mandible, and the series is continued by 
larger rays beneath the opercular apparatus : these cannot 
have been less than 20 in number. Ihe extremities of 
some stout pelvic and anal fin-rays are observed chiefly 
in impression. Tristram Coll. 
P. 66. Remains of head and anterior portion of abdominal region 
of a largo fish ; Hakel. Parts of both maxilke are iden- 
tifiable, bearing the very slender teeth. The premaxillte 
are also shown in impression ; and that of ono side boars 
