244 
ACTIN0FTJ3KXGII. 
Acrognathus libanicus, sp. nov. 
lype. Imperfect, fish ; British Museum. , 
An imperfectly known species about as large as the 
apparently of similar proportions, but with the mandible pe r • 
smooth and the scales marked with very delicate concentric ^ 
following some of those of growth. Tel vie fins arising opP osl 0 g 
origin of the dorsal fin, which comprises 10 or 11 rays, the - 
foremost not divided distally ; anal fin much smaller t an 
dorsal, with about 8 rays. 
Form. 4' Loc. Upper Cretaceous : Sahel Alma, Mt. Lebanor 
P. 9404. Type specimen, a small fish somewhat distorted at 
extremity. The head is too imperfect for descr>P^ ^ 
About 30 vertebrie are distinguishable. Remains ^ 
the fins are preserved, but the dorsal is ven nll ^ oS j n g 
The characteristic squamation is partly remov c , cS I.^ 
an impression of the prominent ridge of the latera ^ q 0 h. 
P- 9405. Fragmentary largo specimen displaying dorsal fi”- ^ 
racteristic upper jaw, and smooth mandible. Al 
P. 9406. Another fragmentary specimen, showing the vel ^ qqH, 
crushed head from above. 
49596-97, 99, 49601 02, P. 9407. Ten imperfect specimens 
playing the various characters of the genus and spec 
Leuns e"" 
P. 9408. 
Small specimen displaying fins, 
heclceli. 
associated with A ( ' 
Enerton 
the following specimens have a relatively deeper trun 
shorter head than those referred to A. libanicus, but it is linc 
whether the differences are due to accidental distortion :■ 
47395, 48110-11, 48124, 48145. Five specimens showing 
characteristic fins and scales ; Sahel Alma. eWl 
Genus LEPTOSOMUS, W. von der Marck. 
[Pahcontogr. vol. xi. 1863, p. 49.] 
As Sardinioides, but paired fins apparent!}’ nearly equal 
and scales not serrated. typical 
All the known species are comparatively small, and e 
forms are slender. 
