152 LÖNNBERG, SOME REMAINS OF NEOMYLODON LISTAI. 



It has been split open by man with some Instrument, pro- 

 bably for the purpose of obtaining the marrow. This frag- 

 ment is too small to be determined with certainty. The ca- 

 vity for the marrow seems to be double, that is what made 

 nie regard it as a part of a cannon bone, and if this is so, 

 its shape most ressembles the bone mentioned. 



No. 4. The fourth fragment is a small piece of a molar 

 tooth of a ruminant, probably the same which is represented 

 by Nos. 2 and 3. 



Nos. 5, 6, and 7 are fragments which, 1 presume, belong 

 to the animal which Ameghino has named Neomylodon listai. 

 I will first describe the outer appearance of these remains 

 after which I will make a comparison between their struc- 

 tures and tissues, and the corresponding ones of some other 

 animals. No. 5 is a triangulär piece of thick skin about 15 

 cm. long by 7,5 broad. Its thickness is about 1 cm. Two 

 sides are newly cut, the third is old and worn. The outer 

 surface is densely covered with a coarse hair of a dirty yel. 

 low or ochreous colour. The hairs of this piece are oiily 2 

 to 3 cm. long, but they are all much worn and mutilated. 

 The lower, or inner, surface has a very peculiar appearance 

 because it is densely beset with ossicles arranged in a man- 

 ner that reminds one of the pavement of an old style street. 

 The ossicles sit just as closely as the stones in such a 

 pavement, and are also irregulär in shape and of different 

 size. The longest diameter of the largest one measures 17 

 mm., but it is only one that attains that size. The large 

 ossicles have otherwise a mean diameter of 12 mm., more or 

 less. They are usually oblong, sometimes nearly ovoid, some- 

 times triangulär or trapezoidal. In addition to these we also 

 find many smaller ossicles which are more rounded or pisi- 

 form with a diameter of 7 to 4,5 mm. The shape of all these 

 ossicles can clearly be seen on the figure 1 which gives a 

 better idea of their appearance than a long description. The 

 distal surface of the ossicles is fixed in the hard connective 

 tissue of the cutis, but to the greater part of their bodies 

 they have probably been imbedded in the subcutis, the looser 

 tissues of which are now lost making them protrude in this 

 manner. Both distal and proximal surfaces are nearly equally 

 convex, but the bodies are, as can be seen from the figure, 

 a little depressed. Their lateral margins are not sharp, but 



