22G 
ACTINOPTERYGII. 
some of its large teeth; and the two dentary bones (d. 
of the mandible occur deeper in the matrix, that of the 
right side being partly obscured. The left articu o 
angular bone (ay.) is displaced, and also partly covere 
by other fragments. The imperfect left operculum (op- 
is distinguishable from its inner face, but is turned ■ 
that its horizontal axis is directed downwards. h"*'® 
the anterior vertebral centra are exhibited, showing 
deep infero-lateral pits for the ribs. Further back a r 
other centra, beneath which the somewhat robust ribs are 
also preserved. There are obscure remains of 
pectoral arch, with traces of very stout pectoral fin-ru^ 
(pci .) ; and there is only a fragment of one other fin. ^ 
dorsal, which has remarkably robust supports, but lS 
shown in the figure. Five of the characteristic scutes (f» 
partly displaced, are observed on the ridge of the bac 
front of the dorsal fin, the two foremost being 8 
chiefly as an impression of the outer face. . 
purchased, lo ai - 
P. 6329. Scattered remains of head and anterior abdominal n 
sketched in outline in the accompanying fig- . g 
imperfect cranium, wanting the ethmoidal regi°m^_^ 
exposed from benoath, and the well-preserved 
D* 31 - . J 
occipital ( h . occ.) demonstrates the absence of a hazier ^ 
canal. The otic region is shown to be well ossiti c _^ ,, tnl 
bounded in front by a prominent sphenotic or post r 
(«p.o.). Further forwards there are remains of t < ^ 
frontals (fr.). The displaced jaws are observe 
the overturned cranium. The imperfect right P a ^ 
(r.pl.) and anterior end of ectopterygoid (r.ecpt- 
partly obscured by the fragments of tho fronta ^ r ^.jj (p 
Next below is part of one of the thin laminar P re ® 
(pmx.), bearing the characteristic regular senes 
recurved teeth. Then follow remains of the e 
tine (l.pl.) and ectopterygoid ( l.ecpt ■), disp a - 1 t ) u . 
characteristic dentition. The hinder portion 
downwards as 
it 
ectopterygoid is toothless, and curves uu | )e 
approaches the quadrate (</><.) ; while it seems 
bounded above by the entopterygoid d 
exhibits the bases of an antero-posteriorh e ” t - 0O 
cluster of minute teeth. The fragmentary him er ^ ^ 
of the right ectopterygoid (r.ecpt.) partly over ies 
