WYLIOBATID^. 
149 
P. 2684. Coarsely marked large tooth ; English Chalk. 
Enniskillen Coll. 
39129. Very large, nearly perfect tooth ; near Croydon, Surrey. 
Bowerhank Coll. 
P. 5337. Similar tooth ; English Chalk. History unknown. 
P. 385-6. Large tooth, and two groups of three naturally associated 
small teeth ; English Chalk. 
Presented hy the Earl of Dude, 1881. 
49848. Small tooth ; Upper Chalk, Guildford. Caj>ron Coll. 
47469. Twelve detached side-teeth, probably found associated ; 
•near Rochester, Kent. Purchased, 1876. 
47908. Very coarsely ridged largo tooth ; near Maidstone, Kent. 
Presented by the Hon. liohert Marsham, 1877. 
28345. Large tooth ; Kent. Dixon Coll. 
P. 1382. Detached crown of large tooth, and three smaller teeth ; 
Kent. Eyerton Coll. 
37350. Large tooth embedded in flint ; Suffolk. Wetherell Coll. 
P. 5864.. Large lower median tooth ; Hertford. 
36103. Very large tooth; Orford, Suffolk. Purchased, 1861. 
P. 5336. Small tooth ; Lower Chalk, Heytesbury, Wilts. 
Enniskillen Coll. 
47498. Plaster cast of specimen figured by Fritsch, ojy. dt. ; Lower 
Chalk, near Koschtitz, Bohemia. 
Presented hy Prof. Dr. Anton Fdtsch, 1876. 
28335. Two small teeth, probably pertaining to young of this 
species ; Brighton. Dixon Coll, 
4373. Small tooth, doubtfully of this species, figured by Mantell, 
op. dt. pi. xxxii. fig. 25 ; Sussex. Mantell Coll. 
Ptychodus mortoni, Mantell *. 
1834. Palate-bones of a fish?, S. G. Morton, Synopsis Org. Remains 
Cretaceous U. S. A, pi. xviii. figs. 1, 2. 
* This species is recorded as Platychodvs mortoni in a “ Catalogue of Fossils 
in Lorenzo G-. Yates’ Collection, Santa Barbara, Cal." (1886), p. 20 ; but the 
present writer has failed to discover the authority for the generic name. 
