. Catalogue of the mammals of western Europe (Europe exclusive of Russia) in the collection of the British Museum. 892 RODENTIA than lialf height. lli)strum ratlier long, nearly parallel-sided wlien \ie\ved from abo\e, though slightly wider somewhat beyond middle than at base, and tapering rather, noticeably in front, its width everywhere greater than that of interorbital constriction; nasals wide, abruptly rounded off anteriorly, where they project so as to conceal incisors, tapering gradually to a narrow base, where they are abruptly truncate at level of posterior extremity of nasal branches
. Catalogue of the mammals of western Europe (Europe exclusive of Russia) in the collection of the British Museum. 892 RODENTIA than lialf height. lli)strum ratlier long, nearly parallel-sided wlien \ie\ved from abo\e, though slightly wider somewhat beyond middle than at base, and tapering rather, noticeably in front, its width everywhere greater than that of interorbital constriction; nasals wide, abruptly rounded off anteriorly, where they project so as to conceal incisors, tapering gradually to a narrow base, where they are abruptly truncate at level of posterior extremity of nasal branches of premaxillaries, and of middle f>f infraorbital foramina ; in lateral view the rostrum is strongly cuneate, its least depth, immediately behind incisors, contained about 2}. times in that at alveolus of m^ ; incisive foramina very small, slit-like, at level of anterior border of zygomatic root, their greatest diameter contained about six times in diastema (three times in sj^ace in front of them, twice in that behind). Palate very narrow, its least breadth scarcely eijual to that of alveolus, its surface marked by a median ridge and two lateral grooves ; pos- terior termination of palate simple, without pits or changes of level; mesopterygoid space parallel-sided, about twice as long as wide, squarely truncate anteriorly at level a little Ijehind that of alveolus of m^ ; hamulars simple, straight, slightly diverging, widely separated from bulhe; ectopterygoid narrow, the pit deep and widely open at bottom. MandiT)le slender, appearing dispro- portionately small for the very large incisor which projects conspicuously behind as well as in front, and to wliich the ramus is little more than a sheath ; coronoid process high, slightly recurved, its anterior border rising abruptly from level of front of }ii.^; articular process low, its base distorted by the shaft of incisor; angular process with rather long, strongly convex lower border, its free portion short, abruptly curved o
Size: 1477px × 1693px
Photo credit: © Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookcollectionbiod, bookdecade1910, bookyear1912
