. Catalogue of the mammals of Western Europe (Europe exclusive of Russia) in the collection of the British museum. Mammals. 702 the underfur a dull, buff'y wood-brown (2 mm.) at tip, the longer hairs black, those of sides and rump with conspicuous buffy tips or sub-terminal areas about 4 mm. in length. In both specimens the long hairs are more conspicuous than in any other European Microtus that I have examined. On sides the buffy wood-brown is nearly clear and distinctly more yellow than the cream-buft' of Ridgway, but on back it is coarsely and conspicuously "lined" with black, the
. Catalogue of the mammals of Western Europe (Europe exclusive of Russia) in the collection of the British museum. Mammals. 702 the underfur a dull, buff'y wood-brown (2 mm.) at tip, the longer hairs black, those of sides and rump with conspicuous buffy tips or sub-terminal areas about 4 mm. in length. In both specimens the long hairs are more conspicuous than in any other European Microtus that I have examined. On sides the buffy wood-brown is nearly clear and distinctly more yellow than the cream-buft' of Ridgway, but on back it is coarsely and conspicuously "lined" with black, the general effect of the two colours approaching olive or bister. Underparts yellowish cream-buff irregularly clouded by the slaty bases of hairs. Feet a dull, light, brownish buffy. Tail obscurely bicolor, pale buffy below, dull brownish above. iSJcuU.—The skull differs from that of all other known European species of 3Ilcrotus in its very highly arched brain-case, which gives the dorsal profile a uniform convexity that is ex- ceedingly characteristic. Interorbital region, in the two skulls examined, rather broad, with distinct median longitudinal concavity and low but evident lateral ridges.* Nasals slightly tapering, their width pos- teriorly about three-fourths that anteriorly, their posterior termination square, slightly exceeded by nasal branch of premaxillary. In both of the skulls examined the length of nasal decidedly surpasses that of diastema, a condition not observed in other European species. Palatal foramina large, their width relatively to that of rostrum greater than in M. arvalis. Auditory bullae not peculiar, their size relatively about as in M. arvalis. Teetli.—The teeth are strictly of the M. arvalis type. Terminal loop of both m-^ and «ii shortened as compared with the other European members of the arvalis group, so that in the former the third inner re-entrant angle is very shallow, and the extreme pos- terior portion of the tooth is a nearly straight l
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectmammals, bookyear1912
