. Catalogue of the mammals of Western Europe (Europe exclusive of Russia) in the collection of the British museum. Mammals. 800 RODENTIA wider posteriorly, its anterior border straight or faintly curved, usually not extending forward quite to level of last molar; hamulars slightly thickened at tip, curved a little outward, barely or not in contact with bullae; ectopterygoid well developed, nearly horizontal, its posterior portion spreading considerably beyond outer alveolar line. Mandible slender, with no special peculiarities of form ; coronoid process small but well developed, directed notic
. Catalogue of the mammals of Western Europe (Europe exclusive of Russia) in the collection of the British museum. Mammals. 800 RODENTIA wider posteriorly, its anterior border straight or faintly curved, usually not extending forward quite to level of last molar; hamulars slightly thickened at tip, curved a little outward, barely or not in contact with bullae; ectopterygoid well developed, nearly horizontal, its posterior portion spreading considerably beyond outer alveolar line. Mandible slender, with no special peculiarities of form ; coronoid process small but well developed, directed noticeably backward, its extremity about on level with condyle ; angular process long and i-ather slender, its inner sui'face with noticeable longitudinal concavity; dental foramen at level of alveoli ; projection marking root of incisor slight but evident, directly under base of coronoid process. Teetli.—Relatively to size of skull the teeth are rather small : alveolar breadth of 111^ distinctly less than half greatest width of palate between tooth-rows ; alveolar length of upper tooth-row a little less than half diastema. Upper incisor strongly Fig. 166. Apodemus sylvatieus. Cheek-teeth, («) slightly worn ; (6) much worn. X 10. forming nearly half of a circle, its root appearing as an evident protuberance on side of rostrum slightly in front of lower portion of infraorbital foramen; shaft compressed, nearly triangular in section, its antero-posterior diameter about double its greatest width, the anterior and inner faces flat, joining each other at a well marked nearly right angle, the outer edge of anterior face curving rather broadly into outer face, the curved portion giving this part of the section a somewhat oblique appearance; posterior face narrow, abruptly rounded, not sharply differentiated from outer and inner faces. Lower incisor slightly longer and much less curved than upper incisor, its root forming a protuberance on outer surface of mandible under base of
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectmammals, bookyear1912
