PI-EISTOCENE GEOLOGY OF THE THAMES VALLEY. 349 



fangs. The latter, since the present specimen belonged to a 

 young individual, are small and only partly developed. Mr. 

 J. P. Johnson has in his collection two teeth of M. glaveolns 

 which he has kindly allowed us to examine. Both specimens 

 are first left lower molars and both have two well developed 

 fangs, the anterior of which are the larger. They each present 

 four outer and four inner angles or prisms differing, therefore, 

 from Blasius' typical form which has five internal angles. They 

 thus more nearly resemble the form figured by Blasius (op. cit.) 

 in his figure i8o in which the fifth or anterior inner prism is 

 merged in the one just behind. 



M. glaveolns has not previously been recorded from the Drift 

 of the Thames Valley, but is known from other Pleistocene 

 beds. It has also been found in the Norfolk Forest Bed. 



Mus sylvaticus. Mr. J. P. Johnson has obtained froni 

 the Orsett Road Section a small fragment of a right rodentian 

 ramus carrymg the anterior molar. The latter agrees in size 

 with the corresponding tooth of M. sylvaticus, and also in the 

 number and arrangement of the tubercles. It differs likewise 

 from M . lewisii in having :i small anterior accessory cusp, which 

 in the latter species is absent. The specimen is, therefore, 

 placed with M . sylvaticus without doubt. 



This species forms a new record for the Pleistocene deposits 

 of the Thames Valley. It has been obtained' from the Ightham 

 Ossiferous Fissures and also from the Norfolk Forest Bed. 



Sorex vulgaris. Remains of the Shrew have long been 

 known from Grays. Three specimens presented by John Brown, 

 of Stanwa}', are in the British Museum (Natural History). The 

 specimens from the Orsett Road Section have been carefully 

 compared with recent skeletons of Sovex vulgaris, and agreeing as 

 they do in every respect with the Common Shrew we have little 

 hesitation in referring them to this species. This form has been 

 met with in ether beds of Pleistocene age and also in the Norfolk 

 Forest Bed. 



AVES. 



[a.) List of Species. 



Anser cinereus, Meyer. 

 Cygnus musicus, Bechstein. 

 Phalocrocorax carbo, Linne, 



