Davis—On the Fossil Fishes of the Chalk of Mount Lebanon. 531 
Acanthopterygu gastrosteiformes, GUNTHER. 
‘The spinous dorsal is composed of isolated spines, if present; the ventrals 
are either thoracic or have an abdominal position in consequence of the pro- 
longation of the pubic bones which are attached to the humeral arch. Mouth 
small at the end of the snout, which is generally more or less produced.” 
Family. FISTULARIIDA. Gunruer. 
Genus. Solenognathus. Picrer and Humperr. 
Solenognathus lineolatus, P. and H. 
(PIP xxvi., fig..6:) 
S. lineolatus. Pricrer and Humpert, 1866. ‘‘ Nouvelles recherches sur les Poissons 
fossiles du Mont Liban.,” p. 56, pl. 1v., figs. 4-7. 
The admirable description of this species leaves nothing to be added. A 
figure is given here which is more perfect than either of the three given in 
the ‘*Nouyelles recherches” of MM. Pictet and Humbert. 
Formation and Locality.—Soft chalk: Sahel Alma, Mount Lebanon. 
Ex coll Museum at Geneva. 
Second Order.—ACANTHOPTERYGII PHARYNGOGNATHI. 
“ Part of the rays of the dorsal, anal, and ventral fins are non-articulated 
spines. The lower pharyngeals coalesced. Air bladder without pneumatic 
duct.” (Giinther.) 
Family, CHROMIDES. 
Genus. Pycnosterinx. HECKEL. 
‘‘ Abbildungen und Beschreibungen der Fische Syriens,” p. 235, pl. xxur., 1843, 
This genus was established by J. J. Heckel for the reception of fossil fishes 
from Mount Lebanon. The following is a translation from the description of 
Dr. Heckel :— 
*Gape moderately wide; each jaw furnished with a number of straight, 
short, closely-set teeth, of which those in the rear become gradually stronger 
and more conical. Operculum rounded; pre-operculum denticulated on its 
border. External branchial arches provided on their anterior border with large 
cultriform osseous apophyses, on the midst of which is a re-curved hook, There 
