CETAOEA. 79 



Memoir (Vert. Forest Bed., p. 109, 1882). Since then an 

 interesting specimen of an aborted tusk in situ has been found by 

 Mr. Savin (see Geol. Mag. Dec. 3., Vol. VI., p. 148, 1889) and 

 there is in the Museum at York what appears to be the swollen 

 base of a similarly aborted tusk from the Suffolk Red Crag Nodule- 

 bed. This species has also been recorded (Woodward, Mem. 

 Geol. Surv., Geology of Norwich, p. 96, 1881) from the Pleisto- 

 cene Brickearth of Sprowston, near Norwich, and the specimen 

 is in the Norwich Museum. 



M. monoceros is now living in the Arctic seas between latitudes 

 70 and 80 and has occasionally been found on the British coasts. 



Genus DELPHINAPTERUS, Lacepede. 



DELPHINAPTERUS LEUCAS, PALLAS. 



(White Whale.) 



A caudal vertebra, from the Forest-bed of East Kunton, 

 near Cromer, in the collection of Mr. A. Savin, has been referred 

 to this species (Geol. Mag. Dec. 3., Vol. VI., p. 148, Plate v., 

 Fig. 3, 1889), and probably also a lumbar vertebra from the same 

 horizon at Overstrand, also in Mr. Savin's collection. The species 

 has been identified from Pleistocene deposits by Mr. Lydekker 

 (Cat. Foss. Mamm. Brit. Mus., Part v., p. 79, 1887) and it is now 

 living in the Arctic seas, occasionally visiting the northern coasts 

 of Britain. 



There are two caudal vertebrae in the Museum of Practical 

 Geology, from the Red Crag, which closely resemble the corre- 

 sponding vertebras of this species. 



Genus DELPHINUS, Linnaeus. 

 DELPHINUS DELPHIS, LINN&US. 



(Dolphin.) 

 (Vert. Forest Bed, p. 110, PLATE VI., FIG. 2.) 



Specimens in the Norwich Museum from Fluvio-marine Crag, 

 Chillesford beds, of Aldeby were identified by Prof. Flower some 

 years since ; and vertebrae, which cannot be distinguished from 

 those of D. delphis, have been found in the Forest-bed of Over- 

 strand, near Cromer. 



