44 PROCEEDINGS COTTESWOLD CLUB I9OI 
preserved, however, and show that they were three in 
number, each tooth possessing two fangs, one in front of 
the other. The specimen is broken just behind the last 
alveolar cavity, so that only the bases of the coronoid 
and angular processes are preserved, while no part of the 
condylar process is seen. The base of the coronoid, 
however, shows that that process rose with a very gentle 
angle of inclination from the superior margin of the 
ramus. On the outer surface the masseter disc is seen to 
be extensively developed and clearly marked off anteriorly 
by the bounding ridges. This character must have given. 
a very compressed aspect to the jaw, such as is found in 
M. sylvaticus, and which distinguishes it from those Voles 
that correspond in size. The position of the mental 
foramen, the slender and compressed character of the 
ramus as a whole, taken in conjunction with the features 
enumerated above, clearly allies the specimen to J/. 
sylvaticus, with which it agrees in size, and I have little 
hesitation in referring it to this species. This form has 
been found in the “Forest Bed,” and also in various 
English Pleistocene deposits. 
2. Rie TILIA. 
Tropidonotus natrix, Linn. (Grass-Snake). A reptilian 
vertebra, having all its processes preserved, belonging to 
the thoracic region, since it possesses the articular sur- 
faces for the attachment of a pair of ribs, agrees so 
closely with the anterior thoracic vertebre of the Grass- 
Snake that I have no hesitation in referring it to this 
species. Remains of 7. zatrzx have been found in the 
Norfolk Forest Bed series, in the Ightham fissures, and 
in the Pleistocene brick-earths of Grays Thurrock, in 
Essex. 
