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Show 1887.] MR. SUTTON ON THE ARM-GLANDS OF THE LEMURS. 369 2. On the Arm-glands of the Lemurs. By J. B L A N D SUTTON, F.R.C.S. [Received February 25, 1887.] In 1884 Mr. Beddard made a communication to this Society, " On some Points in the Structure of Hapalemur griseus" 1: In this paper attention was drawn to a very singular patch of spines on the flexor aspect of the forearm, represented in the accompaning drawing (fig- 1). Fig. 1. The forearm of Hapalemur griseus, showing the patch of spine-like processes and the tuft of hairs. In a postscript to his paper Mr. Beddard was able to state that this collection of spines was not a sexual character, but exists in both sexes of Hapalemur griseus, while it is unrepresented in Hapalemur simus. Mr. Beddard applied for information to Dr. Jentink and to Prof. A. Milne-Edwards. These gentlemen very kindly examined the large series of examples of the two species preserved in the Museums of Leyden and Paris, and found that Hapalemur griseus is distinguished from H. simus by a patch of spines upon the arms, which, however, shows certain differences in the two sexes. In the females the spines are replaced by hairs, but the patch as a whole is quite distinct from the rest of the integument of the arm. Dr. Jentink furthermore directed his attention to a possibly similar structure (a climbing-organ ?) upon the arm of Lemur catta, which has the form of a horny outgrowth somewhat like the spur of a cock. At the time Mr. Beddard was engaged in dissecting Hapalemur he kindly afforded me every opportunity for examining this curious structure on its forearm. This part in question Mr. Beddard describes thus :- 1 See P. Z. S. 1884, p. 391. |
