106 
ACTINOPTERTGII. 
an indication of a slightly enlarged anterior tooth followed 
by two smaller teeth. The broad, sharply-angulated pre- 
operculnm, with thickened anterior border and radiating 
markings, can be distinguished at the back of the head. 
The scattered pectoral fin-rays are remarkabh^ robust; 
and the two examples apparently of the foremost ra}’ 
exhibit much complexity at the divided distal end. At 
this end the ray exhibits longitudinal clefts for the 
greater part of its width, but numerous oblique sutures 
in its front portion. Lewis Coll. 
P. 67-70. Four portions of trunk, with remains of the pelvic, 
dorsal, and anal fins ; Hakel. The stout foremost pelvic 
fin-ray exhibits oblique sutures; the dorsal fin has at 
least 12 supports. The scales are preserved, and the 
radiating grooves in their covered portion are feebly 
indicated. Lewis Coll. 
The following specimens may also be referred to Lclithyodectes, 
but are too imperfect for specific determination :— 
P. 9046. Hinder portion of cranium ; Lower Chalk, Blue Bell Hill, 
Burham, Kent. Presented by S. J. Hawhins, Esq., 1891. 
P. 1792. Anterior end of a pair of large dentaries, and a fragment, 
with bases of teeth ; Chalk, Lewes. Egerton Coll. 
P. 5540. Portion of jaw associated with other fragments; English 
Chalk. Harford Coll. 
P. 1797. Eragment of ver}' stout jaw, with teeth as slender as 
those of I. tenuid.ens ; English Chalk, Egerton Coll. 
P. 4299. Portion of large dentary with undulating oral margin and 
similar teeth ; Chalk, Sussex. Enniskillen Coll. 
P.6016. A much-elongated dentary with traces of similar teeth; 
Gault, Eolkestone. Purchased, 1889. 
49113. Pair of elongated dentaries with sinuous oral border showing 
bases of small teeth; Gault, Eolkestone. 
Mrs. Smith’s Coll. 
35160 a. Anterior half of right maxilla, showing palatine articu¬ 
lation and tooth-sockets; Cambridge Greensand, Cam¬ 
bridge. Purchased, 1859, 
P. 7268. Six fragments of jaws ; Cambridge Greensand. 
Lesson Coll. 
