98 
ACTIXOPT-ERYGII. 
the premaxilla and maxilla, the latter element with a 
concavely arched oral border and shaped as in L. latifrons. 
Below and behind the mandible there occur portions of 
the ceratohyal and epihyal; and the cranial roof-bones, 
besides the operculum, are shown to be tuberculated. 
The serration of the principal flank-scales is very con¬ 
spicuous. Egerton Coll. 
8047. Imperfect head and abdominal region, equalling the pre¬ 
ceding (P. 2006 a) in size. The tuberculations upon the 
cranial and facial bones are exhibited, and the clavicle is 
preserved behind. The removal of part of the squamation 
of the right side exposes the long, slender ribs and traces 
of the somewhat stouter neural arches, but no vertebral 
centra. Mantell Coll. 
P. 6371. Imperfect small fish shortened and deepened by crushing, 
and exhibiting serrated scales. BecJdes Coll. 
P 5591. Imperfect head and trunk of a slightly larger individual 
than no. 8047, apparently deeper and with non-serrated 
scales. The teeth exhibited are unusually stout, diminish¬ 
ing in size in the hinder portion of both jaws. 
Harford Coll. 
P. 4441. Imperfect head and abdominal region of a large fish, with 
the dorsal fin-fulcra and relatively large scales. The 
imperfect coronoid bone is exposed in the mandible. 
Enniskillen Coll. 
P. 1118. Portion of a skull, vertically crushed and exposed from 
within, with some of the anterior dorsal scales shown 
from the inner aspect. The parietals and frontals are 
well shown, and the squamosal is preserved on the left 
side. The pair of supratemporal bones considerably 
overlaps the parietals; and between the two post-temporals 
there occurs a small median element, forming the first of 
the dorsal series of ridge-scales. Anteriorly the ascending 
process of each premaxilla is apposed to the inner face of 
the frontal bone of the same side ; and the displaced left 
mandibular ramus shows that the splenial element, in 
addition to the dentary, bore teeth. The inner teeth are 
much stouter than those of the margin of the jaw; and 
they appear to be in three series on the anterior end 
of the splenial. The circumorbital and suborbital facial 
bones are also in part well displayed. Egerton Coll. 
