310 
ACTINOPTERYGII. 
( pmx .) are preserved, one at the rostral end of the cranial 
roof, the other just to the right of the right frontal; each 
with an extended oral margin and exhibiting a broad 
ascending process at the middle of its upper edge. The left 
maxilla (mx.) occurs in position, much deepened behind and 
bearing very slender teeth ; above it is a relatively large 
supramaxilla (s.mx.). The right mandibular ramus ( rad .), 
imperfectly preserved and wanting its hinder end, is 
displaced beneath the head, and shows traces of small, 
stout conical teeth. The hyomandibular (Jim.) is partly 
exposed in position, but the remainder of the suspensorium 
is very fragmentary, the metapterygoid only being dis¬ 
played on the counterpart, and two isolated bones ( sym .) 
being perhaps the symplectics; the large posterior sub¬ 
orbitals (s.o.) are obscurely indicated, and there are 
remains also of a smaller circ-umorbital ring ( c.o .). The 
epihyal ( ejp.h .) and ceratohyal ( c.Ji .) elements are shown, 
the former triangular and equilateral, the latter much 
contracted in front. All the opercular bones of the 
right side are shown from the inner aspect, the operculum 
(op.) being about as broad as deep with truncated postero- 
superior angle, the suboperculum (s.op.) with a large 
anterior ascending process, the interoperculum (i.op.) 
elongate-triangular, and the preoperculum (p.op.) narrow 
and arched. There are branchiostegal rays below (hr.). 
Nothing can be ascertained as to the ornamentation of 
the external bones. The right supratemporal (st.) is 
exposed from the inner aspect, and there are traces of the 
enlarged post clavicular scales (p.cl.). One of the clavicles 
and both the pelvic fin-supports are displaced beneath 
the trunk ; and, as shown by Winkler’s figure, both the 
fins and squamation are much disturbed. The anterior 
margin of the dorsal fin displays conspicuous fulcra, as 
also does that of the lower lobe of the caudal fin, but it is 
not clear whether they are uniserial; one of these elements 
displayed below the caudal fin is distinctly so, but it may 
have been basal. The scales are not so much deepened on 
the flank as is suggested by Winkler’s figure, and a large 
group of the much narrowed ventral scales is displaced 
beneath the head. All are thick, and whenever well 
displayed in the abdominal region they exhibit delicate 
serrations on the posterior margin; many are also finely 
pectinated. Van Breda Coll. 
