. Catalogue of the mammals of Western Europe (Europe exclusive of Russia) in the collection of the British museum. Mammals. ARVICOLA 727 ears, usually tinged with odiraceous-])uff or light raw-umber, though not sufficiently to produce any marked contrast with surrounding parts; chest and belly a varying mixture of ochraceous-l)utf and the slate-grey under colour, the two becoming more intimately blended on throat and fading to a light drab grey ; feet ranging from hair-brown to ecru-drab, sometimes with a blackish shade ; tail blackish throughout, the underside sprinkled with greyish hairs. Sk
. Catalogue of the mammals of Western Europe (Europe exclusive of Russia) in the collection of the British museum. Mammals. ARVICOLA 727 ears, usually tinged with odiraceous-])uff or light raw-umber, though not sufficiently to produce any marked contrast with surrounding parts; chest and belly a varying mixture of ochraceous-l)utf and the slate-grey under colour, the two becoming more intimately blended on throat and fading to a light drab grey ; feet ranging from hair-brown to ecru-drab, sometimes with a blackish shade ; tail blackish throughout, the underside sprinkled with greyish hairs. Skull.—The skull of Arvicola ampJiibius is lai'ge and massive, becoming conspicuously ridged and angular in fully adult. Fig. 150. Arvicola amphibius. Nat. size. individuals. In general form and proportions it does not differ notably from the skull of Microtus agrestis, except that the brain- case tends to be shorter and wider, the dorsal profile is more evenly convex, without any sudden angular bending down of nasals at interlachrymal region, and the upper incisors project sufficiently forward so that most of their anterior surface is visible when skull is viewed from above. Brain-case somewhat longer than wide, the well-developed postorbital processes squaring its anterior margin and imparting the general outline of a parallelogram ; lateral ridges strongly developed in adults and marking ofT a conspicuous flat median surface widest at. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original British Museum (Natural History). Dept. of Zoology; Miller, Gerrit S. (Gerrit Smith), 1869-1956. London, Printed by order of the Trustees
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectmammals, bookyear1912
