356 
ACTINOPTERTGII, 
1814. Two more imperfect - specimens, displaying all the 
characters noted in the previous specimens; Puy-de- 
Dome. Egerton Coll, 
P, 387 Two imperfect specimens ; St. Saturnin, near St. Amand- 
Tallende. The cranium is partly exposed from above, 
showincr the much-constricted interorbital region and the 
gently rounded roof of the brain-case. Enniskillen Coll. 
P. 5946. Large imperfect specimen ; St. Saturnin. 
Purchased, 1889. 
The following specimen may perhaps represent a member of the 
family Ammodytidse, but it is too imperfect for satisfactoigy^ 
determination :— 
46540. Imperfect caudal region 0’065 in length, associated with a 
specimen of Rhinellus-, Upper Cretaceous, Sahel Alma, 
Mount Lebanon. The vertebral centra are too imperfect 
for recognition, but there are about 24 in the caudal 
region ; the neural and haemal arches are short. The 
dorsal fin is extended, probably with about 20 rays; the 
anal fin, with 14 rays, is opposed to the hinder half of 
the latter. The caudal fin is incomplete distally. The 
scales are indistinct. , Lewis Coll. 
Family SCOMBRESOCID.^. 
Maxilla enteritig the border of the upper jaw ; dentition feeble; 
opercular apparatus complete, with few branchiostegal rays, and 
the gill-opening wide. Lower pharyngeal bones united. Yertebrae 
nunaerous, from 45 to 85 in the total length; centra of abdominal 
vertebrse with transverse processes for the support of slender ribs. 
Pelvic fins without spine but with only about 6 divided rays ; one 
remote dorsal fin, without an anterior spinous portion; anal fin 
opposed to the posterior dorsal. Scales in regular series, but 
usually a keel along each side of the lower region of the body. 
Nearly all the existing Scombresocidee are marine, only a few 
small forms living in freshwater in the tropics. No extinct genus 
is known. 
Genus BSLONI!) Cuvier. 
[Eegne Animal, vol. ii. 1817, p. 185.] 
Head and trunk much elongated and slender. Jaws produced 
into an attenuated beak, the lower scarcely if at all exceeding the 
