XnE RED VXD NORWICH CRAGS. 447 



many years been connected with the preservation of Crag fossils, 

 and to call it Fhoca Moorl. 



4. Phocanella minor, Van Beneden. (PL XVIII. figs. 4 «, 4 h.) 



Prof. Van Beneden has given the above name to certain speci- 

 mens from the Belgian Pliocene*, and Mr. E. C. Moor has a 

 hnmerus from the nodule-bed of the Eed Crag, near Woodbridge 

 (fig. 4), which agrees so closely with the corresponding bone of 

 P. minor that I have no doubt as to its belonging to the same 

 species. The upper portion of Mr. Moor's specimen is wanting, 

 and it is much rolled ; but the general form and remarkable 

 triangular section of the shaft agree precisely with the cast of this 

 species preserved in the British Museum ; but the peculiarities of 

 this humerus are not so well seen in the figures given by Prof. Van 

 Beneden f. 



5. Trogonthekium MiNirs, sp. nov. (PI. XVIII. figs. 5«, oh, 0«, 



6 h.) 



Another interesting specimen in the possession of Mr. E. C. Moor 

 is a right maxiUa (fig. 5) of a beaver-like liodent, also from the 

 nodule-bed of the Red Crag, near Woodbridge. Three teeth are 

 preserved in this fossil, the enamel- folds of which so closely resemble 

 those of Trogontherhmi Cuvieri that I have no doubt as to its 

 belonging to this genus : but the teeth are much smaller than in 

 any known specimen of T. Cuvieri, and I do not feel justified in 

 placing it in the same species, more especially as it comes from a 

 lower horizon than any at which T. Cuvieri has yet been found. 



The three teeth preserved are premolar 4 and molars 1 and 2. 

 The grinding-surface of each of these is more or less triangular, one 

 angle being directed backwards and outwards, while the rounded 

 base is turned forwards. The front surface of premolar 4 is 

 exposed, and is 18 mm. long, 8 mm. wdde, and the grinding-surface 

 is 8 mm. from back to front. Molar 1 is IG mm. lono- 6 mm. 



'»' 



wide, and the grinding-surface 6 mm. from front to back. The 

 length of molar 2 cannot be seen ; it is 5 mm. wide and mm. 

 from front to back. Each tooth has had three enamel-folds on 

 the outer side and one on the inner, as in Castor and Trogontherium ; 

 but they reseuible those of the latter genus in being connected with 

 the exterior of the tooth for only a short distance downwards from 

 the summit ; indeed, in each of these teeth the three outer folds 

 have already become isolated, and the single inner fold is nearly in 

 the same condition. 



This specimen can hardly be a young example of T. Cuvieri, tlie 

 teeth of which increase in size towards their bases, for the alveolar 

 portion of the largest one (pm. 4) is closing in at the base to form 

 fangs, and its greatest width is much less than in 'T. Cuvieri. 



I propose to name this species TrofjoiitheriutH mimiit, and in it to 



* Ann. Mus. Roy. Belg. vol. i. pt. 1, p. 71 (1877). 

 t Loc. cif. pL xiv. 



