EVOTOMYS 225 



Cheek-teeth of normal pattern, but with the salient angles 

 a little less rounded than usual; m^ with third inner infold and 

 fourth inner salient angle quite obsolete, its third outer fold and 

 fourth outer angle vestigial ; outer infolds of lower molars shallower 

 than usual. 



For external and cranial measurements, see tables at end of 

 volume. 



Remarks. — In outward appearance this vole closely resembles 

 E. g. saianicus, but is distinguished by its larger skull. 



B. — nageri group. 



4. t Evotomys kennardi sp. n. 

 1910. Evotomys sp. [nagrri group) Hinton, Proc. Geo!. Assoc, 21, 

 p. 494; Barrett-Hamilton, History of British Mammals, 2, 1914, 

 p. 421. 



Type. — Skull of a young adult (roots of m^ developed but 

 very short), somewhat defective, the frontals damaged behind, 

 the parietals, interparietal, right auditory bulla, jugals, and left 

 m^ missing; collected by Dr. Frank Corner. 



Type locality and horizon. — -Fissure deposit at Ightham, near 

 Sevenoaks, Kent, England. 



Range. — Late Pleistocene of Britain. Known from the 

 Ightham Fissures; Brixham Cave, Devonshire; St. Lawrence, 

 I. of Wight. 



Characters. — Size large (condylo-basal length about 25 mm.), 

 as in nageri group, but a little smaller than in E. ccesarius. 

 Skull long and narrow. Zygomatic arches less widely spreading 

 than in E. g. hritannicus, the greatest zygomatic breadth falling in 

 the jugal region or behind, the arches curving gently away from 

 the rostrum in front. Nasals small, short, their lateral borders 

 nearly straight. Interorbital region much constricted. Brain- 

 case long and narrow, with very small post-orbital (squamosal) 

 processes. Occiput high, its median height relatively greater than 

 in E. shomerensis. Rostrum rather slender; diastema short; 

 incisive foramina large. Palate rather narrow. Mesopterygoid 

 fossa long and narrow. Auditory bullae elongate, narrow trans- 

 versely, with flattened outer faces and small external aperture; 

 containing an appreciable quantity of spongy bone tissue within 

 — a character imknown in other members of the genus. Tooth- 

 rows short, but teeth rather heavy. Enamel jiattern of cheek- 

 teeth normal; nfi usually with a long posterior loop, a well- 

 developed third inner fold and fourth inner salient angle; very 

 rarely the fourth inner angle tends to become obsolete. 



For skull measurements, see table at end of volume. 



Retnarks. — -This species is named in honour of Mr. A. S. 

 Kennard, who has done so much good work upon the British 

 Pleistocene problem. 



