80 MAMMALfA. 



.Genus TURSIOPS, Gervais. 

 TORSIOPS (DELPPIINUS) TUKSIO? BONNAIERRE, 



(Bottle-nosed Dolphin.) 

 PLATE VIII. FIGS. 14, b. 



A delphinoid vertebra indicating a form about twice the size 

 of the common dolphin and nearly as large as the example of 

 Tursiops (Delphinus) tursio in the Museum of the Royal 

 College of Surgeons, has been found in the Forest-bed near 

 Cromer (Mem. Geol. Surv., Vert. Forest Bed, p. Ill, 1882). 



Mr. Lydekker (Cat. Foss. Mamm. Brit. Mus., Part i., p. 84, 1887, 

 No. 35,0420) has noted a vertebra of a closely allied form from 

 the Coralline Crag of Ramsholt, and another from the Pleistocene, 

 of Grays, Essex. There are two vertebrae, probably belonging to 

 the same species, in the Museum of Practical Geology, also from 

 the Coralline Crag itself (not from the Nodule-bed beneath). One 

 of these is from the caudal region and was obtained by Mr. 

 Clement Reid in the Broom Pit at Gedgrave ; it has the transverse 

 process perforated vertically, and the neural spine seems to have 

 been more slender than in T. tursio, but this may be due to its 

 being imperfect. The second specimen is a much broken lumbar 

 vertebra from Orford. 



Van Beneden and Gervais (Osteog. Cetaces, p. 253, 1880) refer 

 to specimens from the Peat (Cambridgeshire ?) agreeing with 

 Delphinus tursio. 



Tursiops tursio is now living in the Atlantic and is represented 

 by a closely allied, if not identical form, in the Peat, Pleistocene, 

 Forest-bed, and Coralline Crag of the east of England. 



Genus PHOOENA, Cuvier. v 

 PHOC^NA COMMUNIS, LESSON. 

 (Porpoise). 



A caudal vertebra of this species has been identified (Geol. 

 Mag. Dec. 3., Vol. VI., p. 149, Plate v., fig. 4, 1889) from the 

 Forest-bed of Sidestrand near Cromer, and is in the collection of 

 Mr. A. Savin. 



Phoccena communis is now living in the North Atlantic and 

 around the coasts of Great Britain. 



DELPHINOID PETROTYMPANICS, not genetically determined. 

 PLATE VIII., FIGS. 9-12. 



A number of small Delphinoid periotics and tympanics, from 

 the Red Crag, which are to be seen in different' collections, and 



