6G 
ACTINOPTEltYGII. 
cranium is longer and narrower than in Chanos sahnone^ 
with the ethmoidal region attenuated and pointed, 
quadrate bones are distinct behind the character!*' 
short, robust, and toothless jaws. The vertebral ceI1 
exhibit deep lateral pits. Fragmentary remains ot a 
fins occur, and the dorsal is shown to have been shgb 3 
deeper than long. The articulations of all the fi n 
are remarkably close. The remains of the squama 
are obscure. Purchased, 1® 
Genus ANCYLOSTYLOS, Kramberger. 
[Djela Jugoslav. Akad. no. xvi. 1895, p. 42.] 
Head and trunk much laterally compressed and deepened. 31° ^ 
terminal; jaws very stout but toothless. Branchiostegal rn> 
probably about 6 in number. Vertebra) in the type species ab° 
28 in the abdominal, 22 in the caudal region ; ribs stout. 
fins arising opposite the anterior part of the dorsal, which is st ^ 
what extended but does not occupy moro than the hinder f>a 
of the back ; anal fin acuminate in front, opposed to the h> n 
portion of the dorsal; caudal fin deeply forked. Scales small, n 
pectinated. 
Ancylostylos gibbus, Kramberger. 
1895. Ancylostylos gibbus, D. Q. Kramberger, loc. cit. p. 42, pi- ix ' 
Type. Nearly complete fish ; Griock Museum. . 0 { 
The type species, attaining a length of about 0-3. Gengt 
head with opercular apparatus somewhat exceeding half th e 
mum depth of the trunk, which is about equal to the length r 
the pectoral arch to the base of the caudal fin. External he * 
bones and preoperculum finely granulated. Pectoral fins with ’ 
pelvic fins with 12 stout rays, the latter not much shorter than 
former ; dorsal fin with about 33, anal with from 20 to 22 rays- 
Form. Uc., Upper Cretaceous : Mrzlek, Croatia. 
Not represented in the Collection. 
Genus ISTIEUS, Agassiz '. 
[Poiss. Foss. vol. v. pt. ii. 1844, p. 91.] 
Head aud trunk much laterally compressed, but elon 0 a 
5r/' n ' S * : men honed, without definition, by Agassiz, Poi 93 - 
