218 
ACTINOPTEEYGII. 
49750. Fragment displaying left premaxilla from the inner aspect; 
Brighton. This bone, which is imperfect behind, hears 
the characteristic minute teeth. Capron Coll. 
49785. Fragment of small skull showing portion of ossified scler¬ 
otic ; Brighton. Capron Coll. 
43392. Small cranium and part of jaws; English Chalk. 
By exchange, 1872. 
25804, 25813, 25896. Kemains of jaws; Sussex. Dixon Coll. 
P. 3057 h. Portion of dentary with teeth; Lewes. 
EnnisTcillen Coll. 
Halec microlepis (Davis). 
1887. Phylactocephalus microlepis, J. W. Davis, Trans. Roy. Dublin 
Soc. [2] vol. iii. p. 605, pi. xxxv. fig. 2. 
1888, Pomognathus, A. S. Woodward, Ann. Mag. Nat. Hist. [6] vol. ii. 
p. 355. 
Type. Nearly complete fish ; British Museum. 
The type species of the so-called Phylactocephalus, attaining a length 
of about 0‘2. Length of head with opercular apparatus scarcely 
exceeding the maximum depth of the trunk, which is contained 
somewhat more than twice in the length from the pectoral arch to 
the base of the caudal fin. Length of mandible about equalling 
the depth of the head at the occiput. Opercular apparatus and 
external ornament as in H. eupterygius. Vertebra3 about 35 in 
number. Dorsal fin wiih about 17 rays, occupying the second 
(quarter of the back, and pelvic fins opposed to its hinder half; 
anal fin very small, with 10 or 11 rays, arising twice as far from 
the pelvic fins as from the caudal. Scales smooth. 
Form. Loc. Dpper Cretaceous.: Mt. Lebanon, Syria. 
P. 4757. Type specimen unsatisfactorily described and figured by 
Davis, loc. cit .; Hakel. The head and opercular bones 
preserved are chiefly those of the right side exposed from 
within. A fragment of the thickened ectopterygoid is 
seen bearing the characteristic teeth ; immediately below 
it are remains of the slender maxilla, with spaced 
teeth at its hinder end. The right mandibular ramus is 
indicated chiefly as an impression of its tuberculated 
outer face; and fragments of the left ramus occur below 
this, with apparently an overlapping trace of the left 
premaxilla. The characteristic preoperculum, operculum 
