SC0PELIDJ3. 
265 
i 
r. 
i 
and a fragment of the more delicate posterior part of the 
element also remains. The latter hears another large 
tooth, which is comparatively short and broad, and this 
is immediately followed behind by a very small tooth of 
the same shape. The base of all the teeth is feebly 
marked with striations. BowerhanTc Coll, 
P. 1798. Hinder extremity of left premaxilla, apparently of this 
species, with a well-spaced series of small teeth regularly 
diminishing in size backwards, and resembling in shape 
the hinder tooth of the last specimen ; probably from 
Grey Chalk, Dover. Egerton Coll, 
49088. Hinder end of left dentary, apparently of this species ; Grey 
Chalk, Dover. The hinder of the two enlarged teeth 
is preserved ; behind this are three irregularly spaced 
teeth not quite half so much elevated ; and after another 
short space there follows a gradually diminishing series of 
five teeth. Mrs. Smith's Coll. 
The following specimens and many other fragments seem to 
represent undetermined species of Apateodus :— 
28390. Dentary bones of mandible, with widely-spaced, slender, 
lanceolate teeth; Chalk, Lewes. Mantell Coll. 
49823. The toothed border of a large deutary, with the two 
enlarged teeth and a diminishing series of nine broad 
- . . teeth behind ; Grey Chalk, Brighton. Capron Coll. 
A.' 
A 
Syn. 
Genus RHUMELLUS^ Agassiz. 
^ _ [Poiss. Foss. vol. ii. pt. ii. 1844, p. 260.] 
Ichthyotringa, E. D. Cope, Bull. U.S. Geol. Surv. Territ. vol, iv 
/Y 
■ a 
1878, p. 69. ^ ^ 
Head excessively elongated by the production of the stout pre- ' 
maxillae and the mandible into a long, slender rostrum ; teeth large 
in the middle of each jaw. Branchiostegal rays about 9 in number. 
Vertebrae about 45 in number, not less than 25 being abdominal; 
the centra slender, much constricted and strengthened by delicate 
longitudinal ridges of bone. Pelvic fins arising almost or exactly 
opposite the dorsal fin; dorsal fin with 12, and anal fin with about 
14 rays. Trunk eompletelj^ covered with a regular squamation, the 
scales not serrated at the hinder border, and only slightly thickened 
or enlarged in the course of the lateral line. 
