. Catalogue of the mammals of Western Europe (Europe exclusive of Russia) in the collection of the British museum. Mammals. 952 \\'rinklc3; lower incisor with root extending slightly beyond W3, which is deflected outward to allow its passage ; section of shaft much as in upper tooth but antero-posterior diameter relatively greater and inner border more flattened. Cheek- teeth large, their roots forming conspicuous capsule-like pro- jections in orbit, and low but evident protuberances on lower portion of outer side of lower jaw, both upper and lower root capsules becoming less noticeable with a
. Catalogue of the mammals of Western Europe (Europe exclusive of Russia) in the collection of the British museum. Mammals. 952 \\'rinklc3; lower incisor with root extending slightly beyond W3, which is deflected outward to allow its passage ; section of shaft much as in upper tooth but antero-posterior diameter relatively greater and inner border more flattened. Cheek- teeth large, their roots forming conspicuous capsule-like pro- jections in orbit, and low but evident protuberances on lower portion of outer side of lower jaw, both upper and lower root capsules becoming less noticeable with advancing age ; outline of crowns squarish, tending to be broader than long above, longer than broad in the mandibular teeth, the outer border of upjDer teeth and inner border of lower teeth straight, slightly crenulate, the opposite borders dis- tinctly bilobed. The pattern of enamel folding is essentially the same in all the teeth : three narrow re-entrant folds on one side, a single wider fold on the other; in the maxillary teeth the three folds are on the outer side, while in the mandibular teeth they are on the inner side ; inner fold in maxillarv teeth nearly straight, extending obliquely forward to come in con- tact with extremity of first outer fold, or frequently in pm* to curve slightly behind it; outer fold in mandibular teeth curving backward between extremities of second and third inner folds, with both of which it is nearly or quite in contact. In the maxillary teeth the first outer fold extends obliquely forward half-way across crown, or in jjjm* occasionally about to inner border, the second outer fold curves noticeably backward and extends nearly to inner side of crown, and the third outer fold extends directly inward or somewhat obliquely backward, its length equal to or a little less than that of first fold, except when the latter assumes its lengthened form. In the mandi- bular teeth the first and third inner folds extend nearly across crown, while the second
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectmammals, bookyear1912
