1872.] 



DR, J. ANDERSON ON MACACUS BRXJNNEUS. 



209 



longitudinal ridge, corresponding to the position of the bone of the 

 organ ; and at the upper extremity the skin of the glans is puckered- 

 in about that end of the ridge. The under surface of the glans is 

 marked anteriorly by the elongated leaf-shaped orifice of the urethra, 

 the inferior end of the penis-bone forming the upper and anterior 



Fig. 3. 



Penis of Macacus brunneus: a, upper surface; b, lower ditto. 



wall of the opening, behind which the urethral canal is considerably 

 dilated for 7'", thedilatation being marked, on its upper wall, by a ridge 

 formed by the genital ossicle. The glans is set on at a very obtuse 

 angle to the body of the penis ; and the whole surface is covered 

 with small recurved spines, very closely set together, and making 

 the surface quite rough. The spines also pass on to the body of 

 the penis between the two divergent halves of the glans ; but in 

 that locality they are much smaller than in the former. The pre- 

 puce is attached to the penis 3"' behind the glans. The head of the 

 bone is attached above considerably to the ventral surface of the 

 base of the glans, but at its margin ; it curves downwards and for- 

 wards, and is exactly one inch long. Its upper half is slightly 

 laterally compressed ; but the lower half is cylindrical. The proximal 

 end forms a somewhat rounded head ; while the distal end is the 

 narrowest portion. 



There are twelve dorsal, six lumbar, four sacral, and eleven caudal 

 vertebrae. 



Metapophvses appear in the eleventh dorsal vertebra, and are 

 strongly marked in the lumbar region ; whilst the anapophyses 

 show in the tenth dorsal — attaining their greatest development in the 

 second, and being reduced to a mere rudiment in the last lumbar. In 

 the last dorsal there is no transverse process, it being resolved into 

 metapophyses and anapophyses. 



Only two vertebrae intervene between the ilia ; but the anterior 



Proc. Zool. Soc— 1872, No. XIV. 



