220 
ACTINOPTERYGII. 
and in the short lobe at the base of the pectoral fin there 
are portions of the long, hour-glass-shaped supporting 
cartilages (_p.&.), which were probably not less than nine 
in-number. Thirty-five rays can be distinctly observed 
in the pectoral fin on the counterpart, and there may 
have been a few more; about five of the foremost rays 
gradually increase in length and seem to have been un¬ 
divided, w 7 hile the remainder are divided and sparsely 
articulated distally. The region which w 7 ould support 
the pelvic fins is broken away, and the anterior portion 
of the anal fin is similarly destroyed. The dorsal and 
caudal fins, however, are very satisfactorily preserved. 
The dorsal is borne on 31 or 32 supports, and seems to 
be slightly the deepest at its middle ; there are two short 
and stout basal rays (or a ridge-scale and a ray) in front, 
undivided, and the second somewhat longer than the first; 
then three gradually lengthening rays succeed, each arti¬ 
culated but not branching ; and the remainder of the fin 
consists of 28 well-spaced rays, each very stout, closely 
articulated, widened, and dichotomously branching from 
a point quite close to its base. The anal fin-rays are 
similar, as also are those forming the middle part of the 
tail. The caudal fin is fan-shaped, surrounding the 
hinder half of the pedicle, and having a sinuously convex 
posterior border. Its marginal rays above and below 
are simple, and gradually increase in length, while the 
fifth or sixth is the first exhibiting articulations. All the 
principal characters of the squamation are displayed, and 
the scales of the whole of the flank are shown to be 
united above and below by the characteristic jagged suture 
(fig. 1 b). The fine lines radiating beneath the tubercular 
ornament from a point on the anterior margin of many 
scales are apparently a structural feature; the radiation 
being exhibited also to some extent on the inner face of 
some scales exposed near the ventral border. The vertical 
flank-series become irregular as they approach the dorsal 
margin throughout the trunk, and towards the ventral 
margin in the caudal region. Intercalary vertical series 
( ic .) of variable length are thrust between them. At the 
base of the dorsal and anal fins they are subdivided into 
very small, irregularly lozenge-shaped scales ; and the 
arrangement of'the small scales on the caudal lobe is also 
not very regular. A few 7 narrow” scales, likewise not eon- 
