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species. They are, moreover, not peculiar to the Lemurs, but exist in the Squirrel, in the Domestic Cat, in the Leopard, in Bassaricyon,^[1] the Otter, various Marsupials, and doubtless in many mammals which require a tactile organ, for these hairs are associated with a large branch of the radial nerve.

Fig. 258.—A, left arm of Hapalemur griseus ♂. 'a', Teat; b, spines on arm gland; c, tactile bristle. B, left foot of Nycticebus tardigradus. 1 to 5, Pads upon sole of foot. (After Sutton, and Mivart and Murie.^[2])

The Lemurs have at the present time a most remarkable distribution. There are altogether about fifty species, referable to seventeen genera. Thirty-six species are confined to Madagascar

1. Beddard, Proc. Zool. Soc. 1900, p. 661.
2. On the Arm Glands of the Lemurs, Proc. Zool. Soc. 1887, p. 369.