. Catalogue of the mammals of Western Europe (Europe exclusive of Russia) in the collection of the British museum. Mammals. 90 INSECTIVOKA. Fig. 18. Crocidura leucodon. Anterior teeth in pioflle. x 5. triangular, its height less than half that of main cusp and only a little more than half that of first unicuspid tooth. General form of first incisor not unlike that of Neomys fodiens, but with even more contrast between height of the two cusps. Anterior lower incisor simple, rather robust, the shaft slightly taper- ing, the point slightly bent upward, the cutting edge without lobes. Upper unicus
. Catalogue of the mammals of Western Europe (Europe exclusive of Russia) in the collection of the British museum. Mammals. 90 INSECTIVOKA. Fig. 18. Crocidura leucodon. Anterior teeth in pioflle. x 5. triangular, its height less than half that of main cusp and only a little more than half that of first unicuspid tooth. General form of first incisor not unlike that of Neomys fodiens, but with even more contrast between height of the two cusps. Anterior lower incisor simple, rather robust, the shaft slightly taper- ing, the point slightly bent upward, the cutting edge without lobes. Upper unicuspids robust, strongly contrasted in size. First about double the height of second and third, the points of which are nearly in line with that of basal lobe of anterior incisor. Its crown is somewhat longer than broad, with main axis slightly oblique to that of tooth-row. In lateral view it is nearly triangular, with anterior border about half as long as upper and lower. Cutting edge essentially as in Neomys, but better developed and reaching posterior border of tooth somewhat outside of middle. Crushing surface well developed, occupjnng about one-third area of crown. Second and third unicus- pids aj)proximately equal, in both height and crown area, to basal lobe of anterior incisor, their crowns distinctly narrower as well as much shorter than that of first unicuspid, their cutting ridge and crushing sur- face less well difieren- tiated than in first. Second smaller than third, its crown aboiit as broad as long. Third separated from large pre- molar by a slight space, its crown longer than broad, its cusp about equal in height to para- cone of large premolar. Lower unicuspids essen- tially alike in form, the second differing from that of Sorex and Neomys in the complete absence of the rudimentary second cusp. First low, narrow and long; second high, its crown about as broad as long. Upper cheek-teeth with crowns narrower than in Sorex and. Please note that these images are extr
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectmammals, bookyear1912
