DOLOMYS 347 



OT3; but »ij (Fig. 98a') shows some interesting complications 

 of the anterior loop. Tubercles representing a fifth outer and a 

 sixth inner angle are present ; and between them is an antero- 

 median tubercle. These, with the little valleys separating them, 

 are ephemeral structures confined to the upper strata of the 

 tooth and doomed to disappear long before wear touches that 

 part of the tooth now emerging from the alveolus. In this 

 specimen the cement spaces on the inner sides of the lower molars 

 are closed below; while on the outer side of m^ the beginning 

 of the large anterior fang is plainly seen (Fig. 976). 



Fig. 98. — Cheek-teeth of Dolomys hoydanovi ^lartino. 

 Left upper (a. h.) and right lower (a', h'.) molars. 



a. and a'. Molars of type specimen (immature); the anterior loop of m, 

 shows ephemeral complications, and part of the left Wj is 

 ' figured for comparison with the right Wj, the teeth being in 



I slightly different stages of wear on the two sides of the jaw. 



; 5. and 6'. Molars of adult specimen (B.M., No. 23.11.1.8). 



Measurements (taken in the flesh by the collector) of the 

 type and of an adult male (in parentheses). — Head and bodv, 99 

 (130) mm.; tail, without hair, 74 (101); hind-foot, 25 (25-4); 

 • ar, 15 (18-5). 



For shull measurements, see table at end of volume. 

 I Remarks. — The outward appearance and the more superficial 

 Icharacters of the dentition and skull, particularly in the young 

 specimen from which this species was first described, somewhat 

 resemble those of the Snow Voles, and Dr. Martino was quite 

 naturally misled into describing this remarkable animal as a 

 aew species of Chionomys. The possession of rooted molars, 



