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Show 1899.] NEOMYLODON LISTAI FROM PATAGONIA. 149 0*02 m. in diameter, which might possibly hare been caused by a bullet or a dagger, but in any case was probably pierced Avhen the skin was still fresh. OAving to its direction, this hole is partly obscured by the overhanging hair in PI. XIII. The skin in its dried state A^aries in thickness in different parts. The average thickness of the flattened portion, which must be referred to the back, is shown by the cleanly-cut right margin of the specimen to be 0*01 m. This is slightly increased towards the posterior (lower) end of the border ; while above it, at E, the thickness becomes 0'015 m. The latter thickness also seems to be attained in the much-shrivelled corner marked C - a circumstance suggesting bilateral symmetry between at least part of the two anterior outer angles of the specimen. The thinnest portion preserved is the border above B ; and the skin must also have been comparatively thin in the region of the accidental notch to the left, considerably below C. The portion of skin above B is interesting not only from its relative thinness, but also from the occurrence of an apparently natural rouuded concavity in the margin. This excavation, which measures 0-05 m. along the curve, is marked bj the remains of a thin flexible flap, which is sharply bent outwards, and is covered with short hairs on its outer face. It is especially suggestive of the base of an ear-conch; and if this appearance be not deceptive, it is worthy of note that the dried skin hereabouts and in the region which Avould have to be interpreted as cheek (C) is much more wrinkled than elsewhere. As already mentioned, the outer aspect of the skin is completely covered with hair, which is very dense everyAvhere except on the left anterior corner. Here it seems to haAre been removed by abrasion. A small patch of hair has also clearly been pulled out near the gap in the left border of the specimen ; and close to the middle (where marked D ) there is a small hairless depression which may perhaps be interpreted as a Avound inflicted and healed during life. The hair is only of one kind, Avithout any trace of under-fur, and it is still very firmly implanted in the skin, without signsof decay. Its arrangement seems to bequite regular, there being no tendency towards its segregation into small groups or bundles. It is of a uniform dirty yellowish or light yellowish-brown colour, and, making due allowance for slight ruffling and distortion of the specimen, it may be described as all lying in one direction, vertically in the drawing (PI. XIII.), except at the two upturned anterior corners of the specimen, where there is an inclination from the right and left respectively towards the centre. The longest hairs, which usually measure from 0-05 m. to 0-065 m. in length, are observed in the half of the specimen in front of (above) the letter D. Those in the middle of the extreme anterior (upper) border measure from 0"03 m. to 0-05 m. in length, those at the hinder (loAver) border about the same; while some of the comparatively small and delicate hairs on the supposed cheek are not longer than 0-01 m. The hairs are stiff, straight, or only very slightly wavy, |