M. A. C. Hinton — British Fossil Shrews. 533 



Soeex sp. (PL XXV, Fig. 10, and Text-fig. 10«.) 



Sorex vulgaris, Hinton & Kennard (in part), Essex Naturalist, vol. xi, p. 349, 

 1900. 



Among the Shrew remains collected by Mr. Kennard and the writer 

 from the Middle Terrace brickearth of Grays Thurrock are a posterior 

 half of a left ramus, several still more fragmentary- rami, and some 

 imperfect humeri of a species of Sorex. In size this Middle Terrace 

 form is smaller than S. araneus, the difference being quite noticeable in 

 the lower jaw and still more marked in the humeri. The posterior end 

 of the jaw (Figs. 10, \0a) offers some differences in the form of the 

 coronoid process and condyle. The fossa for the insertion of the lower 

 part of the temporal muscle, etc., on the outer surface of coronoid 

 process, is absolutely larger than it is in the bigger jaw of S. araneus ; 

 the superior articular facette is reduced transversely. The teeth have 

 a weak cingulum externally ; the staining appears to have been quite 

 weak because little trace of it can be seen in the only moderately 

 worn teeth of the figured specimen, although the colour is well 

 preserved in the teeth of the species of Neomys occurring in the same 

 deposit. 



I have no doubt that this Middle Terrace Shrew is distinct 

 specifically from any of the other forms described in this paper. 

 I refrain from naming it because the material is so scanty. 



Sorex kennardi, n.sp. (PI. XXV, Fig. II, and Text-fig. 1165.) 



Material examined. — Anterior part of a skull and both mandibular 

 rami of one individual from the Third Terrace drift of the Lea Valley 

 at Ponders End, Middlesex. 



Characters. — Size distinctly smaller than S. araneus, larger than 

 S. minutus. Apai't from its smaller size there is little to distinguish 

 what is left of the skull from that of S. araneus; the mesopterygoid 

 fossa is proportionately broader, and does not narrow behind. The 

 incisors and unicuspids have unfortunately dropped out, but the 

 alveoli show that the latter were five in number, and, apparently, 

 that they decreased in size regularly from before backwards as in 

 S. alpinus and S. minutus, and not in rough pairs as in S. araneus. 

 The cheek-teeth, p. x -m. -, have the posterior emargination less 

 deep than in S. araneus. The mandible (Figs. 11, 1 la) is distinguished 

 by its form and size ; condyle agrees better with S. minutus and 

 S. alpinus in form than with S. araneus. 



Remarks. — We owe the discovery of the specimen here described 

 to the keen eye of Mr. A. S. Kennard, who obtained it on the occasion 

 of a visit of the Geologists' Association to the very important section 

 at Ponders End. 1 I am unable to refer it to any known species, 

 and have great pleasure in naming this form after my friend, to whom 

 I am indebted in so manv wavs. 



1 Warren, Nature, vol. lxxxv, p. 206, 1910; Proc. Geol. Assoc, vol. xxii, 

 p. 168, 1911. 



