1837.] 



ARM-GLANDS OF THE LEMURS. 



371 



the arm of Lemur catta, and was enabled to make some preliminary 

 observations concerning it in the ' Journal of Comparative Medicine 

 and Surgery,' New York, Jan. 1887. 



The comb-like organ on the arm of Lemur catta may be thus 

 described : — 



It is situated about two inches above the wrist-joint, on the 

 flexor aspect, and in a young Lemnr is about three-eighths of an 

 inch in length. It is of an oval shape, soft, compressible, and 



Fig. 3. 



Forearm of an adult Lemur catta, showing the blunt spur described in the text. 

 The smaller figure is the arm of a foetal Lemur catta, to show the tuft of 

 long hairs. 



marked with fine lines like the tip of the finger, and of a black 

 colour. The organ is raised above the general level of the integu- 

 ment to the extent of an eighth of an inch. Its major axis lies in 

 the long axis of the limb, and it is continuous with the palm of the 

 hand by a narrow strip of black hairless skin. The organ is present 

 in the male and female. In older Lemurs a hard callous projecting 

 spur is seen on its inner side. 



This spur or projection in Lemur catta resembles, on a large 

 scale, tlie spines on the arms of Hapalemur, and I have no doubt 



