10 



MAMMALIA. 



species of Canis ; and, indeed, the shape of the tooth would be 

 remarkable in this genus. It seems liighly probable that this 

 tooth will prove to be Cetacean ; but as I know of', nothing 

 exactly of the same form, it is for the present left with doubt in 

 the genus Canis. i 



Genus PTERODON? Blainville. 

 Plate I., Fig. 7, a, b. 



Prof. Owen (Quart. Journ. Geol. Soc, Vol. XII., p. 227, 

 Fig. 20, 1856) figured and described a tooth from the Red Crag 

 of Suffolk which he thought was allied to Hymnodon and Pterodon. 

 He says concerning this sectorial tooth that it " deviates from the 

 feline typo and approaches that of the carnassial in the Glutton, 

 Hysena, and Grison, but with a minor development of the 

 outer cingulum ..... it closely resembles one of the 

 teeth of the Miocene carnivora to which the generic names 

 Hycenodon and Pterodon have been given." 



I have been unable to trace the specimen here referred to, but 

 provisionally retain the genus on Sir .1^. Owen's authority. 

 The tooth was most probably obtained from the Nodule-bed of 

 the Eed Crag. 



Genus MI] STELA, Linnaeus. 



mustela martes, linnm us. 



(=Maetes sylvatioa, Nillson.) 



{Pine Marten^ 



(Vert. Forest Bed, p. 25. Platu IV., Fig. 3, 3a.) 



The occurrence of the Marten in the Forest-bed at West 

 Runton was first noticed in 1880 (Geol. Mag., Dec. 2, Vol. VII., 

 p. 150) ; the specimen was figured in the Survey Memoir under the 

 name Martes sylvatica ; but I am not aware that it has been re- 

 corded from any other Pliocene deposit. The Marten is, however, 

 known to occur in Cave-deposits {Vide Boyd Dawkins, Quart. 

 Journ. Geol. Soc, Vol. XXV,, p. 192, 1869, and 7ol. XXXVI., 

 p. 400, 1880). 



With regard to the name which should be adopted for this 

 species ; if the two genera Mustela and Martes are distinct then 

 the present form must be called Martes sylvatica, as was done by 

 Mr. Edw. R. Alston (Proc. Zool. Soc, 1879, p. 468); but when 

 they are united in a single genus, then the species under con- 

 sideration is rightly called Mustela martes; and as the latter 

 course is adopted by Professor Flower (Oat. Vert. Coll. Surgeons, 



