LEPIDOTUS. 16] 
Lamily SeMionoripe. 
It is doubtful whether Lepidotus or allied genera survived into the Upper 
Cretaceous, but some scales from the Chalk Marl appear to represent one of 
these fishes. 
Genus LEPIDOTUS, Agassiz. 
Lepidotus, L. Agassiz, Neues Jahrb., 1832, p. 145 (Lepidotes), and Poiss. Foss., vol. ii, pt. i, 1833, 
pp. 8, 238. 
Generic Characters.—Trunk fusiform and only moderately compressed. 
Marginal teeth robust, styliform; inner teeth stouter, often rounded but smooth. 
Opercular apparatus well developed, with a narrow arched preoperculum, but 
with few branchiostegal rays and no gular plate. Fin-fulcra very large, in a 
double series on all the fins. Paired fins small; dorsal and anal fins short and 
deep, the former opposed to the space between the latter and the pelvic fins; 
caudal fin sheghtly forked. Scales very thick, smooth or feebly ornamented ; 
flank-scales not much deeper than broad, with their wide overlapped margin 
produced forwards at the superior and inferior angles; scales of the ventral 
aspect not much broader than deep; dorsal and ventral ridge-scales usually 
inconspicuous. 
1. Lepidotus (2) pustulatus, A. S. Woodward. Plate XXXYV, figs. 1—4. 
1895. Lepidotus (?) pustulatus, A. S. Woodward, Catal. Foss. Fishes B. M., pt. ii, p. 121, pl. viii, fig. 1. 
Type-—Group of scales ; British Museum. 
Specific Characters.—A large species known only by scales, which sometimes 
measure 35 mm. in length in their exposed portion. Scales moderately stout, 
with a thin and sometimes discontinuous layer of enamel, marked by irregularly 
arranged, large, round shallow pits and pustules; principal flank-scales exhibiting 
a few broad ridges and furrows radiating from the centre to the hinder border, 
where they form feeble digitations ; several scales much broader than deep. 
Description of Specimens.—The scales generally resemble those of some of 
the large Upper Jurassic species of Lepidotus, but are characterised by their peculiar, 
sparse pustulation. The enamel on their outer face is always extremely thin, 
except round the margin; their peg-and-socket articulation is very feeble, and their 
inner face is at most only gently tumid, not ridged. Their overlapped border is 
very wide, and sometimes shows its forward production at the angles (Pl. XXXYV, 
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