EUGNATHIDiE. 
327 
than broad, and much broader below than above, while 
its external face is finely and closely tuberculated. The 
basals of the pectoral fins are long and slender, constricted 
mesially, and more than six in number. Appearances are 
not quite clear, but the largest basal seems to be the 
hindermost. Some of the scales exhibit the very large 
peg-and-socket articulation; and others are finely orna¬ 
mented, showing the tubercles passing into striae poste¬ 
riorly. Egerton Coll. 
P. 3655. Imperfect trunk noticed by Egerton, loc. cit.; Lyme 
Regis. The specimen is much disturbed by crushing, and 
so probably does not afford a correct idea of the form of 
the fish, the caudal pedicle being deepened and the fins 
somewhat displaced and fragmentary. There are separate 
hypocentra and pleurocentra, as in the type specimen, 
none fused together. Each hypocentrum in the abdominal 
region is semicircular, flattened and indented with two 
longitudinally-elongated pits on its inferior face, bearing 
a pair of short lateral processes for the support of the 
ribs. The pleurocentra are too imperfectly shown for 
description. There are remains of the much-elongated 
basals of the pectoral fin, and one of the robust, hour¬ 
glass-shaped pelvic bones is preserved. The median fins 
are in great part destroyed. The scales are shown in 
undisturbed order dorsally for some distance in advance of 
the dorsal fin ; and many narrow scales of the ventral 
aspect are exhibited. The scale-ornament is well pre¬ 
served, and the tubercles rarely pass into striae on the 
hinder half of the scale. Enniskillen Coll. 
P. 3648. Type specimen of the so-called Harjpactira ( Harjpactes ) 
velox, described by Egerton, loc. cit. ; Lyme Regis. This 
is a curiously preserved specimen about one metre in 
length, with remains of all the fins except the anal 
nearly in position, but wanting the whole of the axial 
skeleton of the trunk, and showing only a few traces of 
the squamation. The head is very imperfect and obliquely 
crushed. The greater part of the right mandibular ramus 
is exhibited from the inner aspect. The dentary is much 
fractured in front, though showing the coronoid elevation 
behind ; while the splenial is displaced, but sufficiently 
complete to exhibit its clustered small slender teeth and 
the excavation of its hinder margin. Some of the charac- 
