EUGNATHIDJE. 
345 
and hypocentra, the latter with a pair of short processes 
for the support of the delicate ribs. In the abdominal 
region the series of curved robust neural spines, separate 
from the supporting arches, is well exhibited. The 
imperfect left clavicle is displaced upwards, and the 
comparatively thin and laminar supraclavicle lies above 
it. In the remains of the pectoral fin, the stout foremost 
ray is conspicuous ; and the very fine distal subdivision 
of most of the rays is well shown. One of the pelvic fins 
occurs almost in its natural position, comprising seven or 
eight rays, with a series of large fulcra on its anterior 
margin. About sixteen rays are preserved in the frag¬ 
mentary dorsal fin, with a few displaced fulcra and 
thirteen of its basal bones. The caudal fin is too im- 
jjerfect for description, and the anal is wanting. The 
squamation is also very imperfect, and the only ornament 
is observable on some of the scales of the flank, which are 
crimped much like the scales of Eugnatlius. 
Enniskillen Coll. 
P. 3645. An imperfect head, exposed from the right side; Lyme 
Pegis. A fragment of the occipital portion of the 
cranium occurs behind, and the squamosal is shown to be 
ornamented with a few sparse tubercles. The cheek- 
plates are mostly smooth, but sometimes feebly tuber- 
culated and frequently rugose towards the margin. The 
maxilla ( mx .) and supramaxilla (s.mx.'). are shown of the 
natural size in PI. Y T II. fig. 3. The bases of two very 
large premaxillary teeth are seen, and there is evidence 
also of equally large teeth in the mandible, which is 
unfortunately much obscured. The preoperculum is 
rugose near its hinder margin; while the crushed 
remains of the operculum and suboperculum exhibit a 
few small sparse tuberculations. Enniskillen Coll. 
P. 514. Crushed fragment of jaws, the dentary shown of the 
natural size in PI. VII. fig. 2, and intended by Agassiz to 
be described as the type specimen of Conodus ferox; 
Lyme Pegis. Three large dentary teeth are preserved, 
though somewhat broadened at the base by accidental 
crushing; and there are the bases of smaller teeth in 
fragments of the maxilla. The very small and stout 
splenial teeth are also seen. Egerton Coll. 
