. Catalogue of the mammals of western Europe (Europe exclusive of Russia) in the collection of the British Museum. ARVICOLA 739 fossorial structure. This is shown by the more pronounced forward projection of tlio upper incisors, and more particularly by the shortening and widening oi the brain-case in general and the slightly greater obliijuity of the occipital region. Flattened. Fig. 153. Arcicola terrestris. Nat. size. area between lateral ridges on brain-case tending to assume a diamond-shaped outline rather than that of an irregular paralello- gram. Antero-posterior diameter of interpariet
. Catalogue of the mammals of western Europe (Europe exclusive of Russia) in the collection of the British Museum. ARVICOLA 739 fossorial structure. This is shown by the more pronounced forward projection of tlio upper incisors, and more particularly by the shortening and widening oi the brain-case in general and the slightly greater obliijuity of the occipital region. Flattened. Fig. 153. Arcicola terrestris. Nat. size. area between lateral ridges on brain-case tending to assume a diamond-shaped outline rather than that of an irregular paralello- gram. Antero-posterior diameter of interparietal usually more than half transverse diameter, the outer margins of the bone almost squarely truncate. Teeth.—Except for their slightly smaller .size the teeth exactly resemble those of Arvicola aniphibius. Measurements.—Adult female from Holme, Mandal, Norway : head and body, 167 ; tail, 99 ; hind foot, 29. Adult male from Christiania, Norway : tail, 105 ; hind foot, 29. Adult from Vefsen, Nordland, Norway : hind foot, 31 ; ear, 16. Adult female from Jemtland, Sweden : head and body, 187 ; tail, 104 ; hind foot, 30. Two adults from near Stockholm, Sweden : hind foot (dry), 27'6 and 29'4. For cranial measurements see Table, p. 742. Specimens examined.—Thirty-eight, from the following localities :— Norway :—Vefsen, Nordland, 1; Elverum, Hedemarken, 1 (); Christiania, 1 (); Askor, Christiania, 1 (); Holme, Mandal, 16. Sweden :—Jemtland, 7; Upsala, 2 ( and ); Upland, 2 3 B 2. 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). Department of Zoology. [Mammals]; Miller, Gerrit Smith. London : BMNH
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