54 MAMMALIA. 



has been noticed in the Lignites of Lombardy by Dr. ForSyth 

 Major (Atti Soc. Ital. Sci. Nat, Vol. XV., p. 389, 1872). 



Genus LEFUS, Linnaeus. 



Lepus cuniculus is included by Messrs. R. and A. Bell in their 

 list of Upper Crag Mammals (Proc. Geol. Assoc, Vol. II., 

 p. 212), but I have been unable to verify their record. 



The Museum of Practical Geology has recently acquired, 

 through Mr. T. Jesson, a portion of an incisor tooth, from the Red 

 Crag of Butley, which agrees very closely with the lower incisor 

 of the rabbit; but the hinder part of this tooth, which is not 

 protected by enamel, is not so thick. The lesser thickness of the 

 fossil tooth may be due to partial denuding, but, even if allowance 

 be made for this, the evidence is not sufficient to justify a specific 

 determination. The genus, however, may be recorded. 



EODENT ; GENUS UNDETERMINED. 



Plate V., Figs. 19a, b. 



Mr. James Reeve, the Curator of the Norwich Museum, 

 obtained, from the Norwich Crag of Bramerton, a small cheek 

 tooth of a Rodent presenting peculiarities unlike any tooth with 

 which I am acquainted. The specimen was found inside a uni- 

 valve shell, so that it is quite certain that it belonged to the Crag, 

 and had not been introduced at a later period. This tooth is 

 about 1 4 mm. in length and 3 mm. in width, and being the same 

 size from top to bottom, and without any sign of fangs, no doubt 

 had a persistent pulp. In section the tooth is triangular or. rather 

 heart-shaped. On one side there are two grooves running the 

 length of the tooth, and between these a fold of enamel extending 

 half way across the tooth. 



