AJ YLIOBATID-E. 
149 
P. 2684. Coarsely marked large tooth ; English Chalk. 
Enniskillen Coll. 
39129. Very large, nearly perfect tooth; near Croydon, Surrey. 
Bow&rbank 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 by the Earl of Eucie, 1881. 
49848. Small tooth ; Upper Chalk, Guildford. Capron Coll. 
47469. Twelve detached side-teeth, probably found associated; 
near Rochester, Kent. Purchased, 1876. 
47908. Very coarsely ridged large tooth; near Maidstone, Kent. 
Presented by the Hon. Robert Marsham, 1877. 
28345. Large tooth ; Kent. Dixon Coll. 
P. 1382. Detached crown of large tooth, and three smaller teeth ; 
Kent. Egerton Coll. 
37350. Large tooth embedded in flint; Suffolk. Wetherell Coll. 
P. 5864.. Large lower median tooth; Hertford. 
36103. "Very large tooth; Orford, Suffolk. Purchased , 18bl. 
P. 5338. Small tooth ; Lower Chalk, Heytesbury, Wilts. 
Enniskillen Coll. 
47498. Plaster cast of specimen figured by Eritsch, op. cit.; Lower 
Chalk, near Koschtitz, Bohemia. 
Presented by Prof. Dr. Anton Eritsch, 18/6. 
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. cit. 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. 
1 This species is recorded as Platychodus mortoni in a “ Catalogue of Fossils 
in Lorenzo G. Yates’ Collection, Santa Barbara, Cal.'’ (1886), p. 20 ; but the 
present writer has failed to discoxer the authority for the generic name. 
