106 
ACTINOPXERYGII. 
an indication of a slightly enlarged anterior tooth followed 
by two smaller teeth. The broad, sharply -an gulated pre- 
operculum, with thickened anterior border and radiatm? 
markings, can be distinguished at the back of tho he 
The scattered pectoral fin-rays are remarkably roba s 
and the two examples apparently of the foremost raj 
exhibit much complexity' at the divided distal end. 
this end the ray exhibits longitudinal clefts f° r 
greater part of its width, but numerous oblique sutur 
in its front portion. Lewis Con- 
67-70. Four portions of trunk, with remains of the pelri®> 
dorsal, and anal fins ; Hakel. The stout foremost P elvl ® 
fin-ray exhibits oblique sutures ; the dorsal fin has * 
least 12 supports. The scales are preserved, and t 
radiating grooves in their covered portion are f e ® J 
indicated. Lewis Col 1 - 
The following specimens may also be referred to Ichthyodectes, 
but are too imperfect for specific determination : — 
P. 9046. Hinder portion of cranium ; Lower Chalk, Blue Bell Bdb 
Burham, Kent. Presented by S. J. Hawkins, Esq-, 16 
P. 1792. Anterior end of a pair of large dentaries, and a fragmen > 
with bases of teeth ; Chalk, Lewes. Egerton Co ■ 
P- 5646. Portion of jaw associated with other fragments ; 
Chalk. Harford CoU- 
P- 1797. Fragment of very stout jaw, with teeth as slender as 
those of I. tenuidens ; English Chalk. Egerton Co ■ 
P. 4299. Portion of large dentary with undulating oral margin an 
similar teeth ; Chalk, Sussex. Enniskillen Co ■ 
P. 6016. A much-elongated dentary with traces of similar 
Gault, Folkestone. Purchased, 16 
49113. Pair of elongated dentaries with sinuous oral border showi & 
bases of small teeth ; Gault, Folkestone. „ „ 
Mrs. Smith’s CoH 
35160 a. Anterior half of right maxilla, showing palatine ar *’ C 
lation and tooth-sockets ; Cambridge Greensand, a 
bridge. Purchased, 16° ‘ 
P. 7268. Six fragments of jaws ; Cambridge Greensand.^ ^ 
