CHIROCENTRIDiE. 
103 
outwards in a longitudinal ridge ; its depth at the symphysis about 
equal to one quarter the total length of the mandibular ramus ; 
teeth upright and straight, not curved at apex, and total number of 
sockets in dentary about 30. 
Form. &( Loc. Turonian : Sussex, Kent, and Surrey. 
28894. Type specimon, figured by Egerton, described and figured 
by Newton, be. tit. ; Chalk, Sussex. The left mandibular 
ramus measures 0-14 in length. Dixon Coll. 
39064. Portion of both dentaries ; near Maidstone. 
Bowerbank Coll. 
49831. Fragment of dentary ; Dorking, Surrey. C apron Coll. 
Ichthyodectes elegans, Newton. 
[Plate IX. figs. 4, 5.] 
1877. Ichthyodectes elegans, E. T. Newton, Quart. Journ. Geol. Soc, 
vol. xxxiii. p. 521, pi. xxii. fig. 15. 
Type. Imperfect dentary ; British Museum. 
A small species known only by the jaws. Oral border of dentary 
slightly concave, curved upwards to the beak-like symphysis ; its 
outer face gently sinuous, not sharply bent or ridged ; its teeth 
very small at the symphysis, but of moderate size and in regular 
series beyond, the crowns slender, all inclined a little forwards, 
with the apex slightly curved inwards ; tho dental sockets about 
40 in number. Maxilla scarcely deepened in front, and the oral 
border straight ; teeth somewhat smaller, stouter, and less inclined 
than those of the dentary, minute at the hindor end of the bone. 
Form. <5f Loc. Turonian : Surrey and Kent. 
41687. Type specimen ; Lower Chalk, Dorking. 
Toulmin Smith Coll. 
P. 5644-45. Imperfect right and left dentaries and left maxilla, 
found associated ; Lower Pit, Upper Hailing, Kent. The 
left dentary is shown of the natural size, from the inner 
aspect, in PI. IX. fig. 5, while tho maxilla is similarly 
represented from the outer aspect in fig. 4. Their specific 
characters are mentioned above in the diagnosis. 
Harford Coll. 
47251. Fragment of right dentary ; Lower Chalk, Dover. 
Gardner Coll. 
