1890.] NATURAL SCIENCES OF PHILADELPHIA. 13 



The side, the front, and the back of the neck. 



The base of the prebrachium. 



The side, the front and the back of the trunk. 



The rum]), the lower part of which forms the sacral region. 



The infra-anal region or the space below the anus. 



The crown may be said to extend back as far as the ears. 



The occiput, to reach from the crown to the end of the curve from 

 the crown to the neck. 



The face (exclusively of the dorsum of the muzzle) commonly has 

 the hair directed in varying degrees backward. The face mav be 

 naked except in clumps, or lines which will receive names accordino- 

 to their locations. 



The " u-hisker" is the growth of hair which lies in front of the au- 

 ricle. It connects the hair of the crown with that of the side or the 

 front of the neck and the space between the rami. The hair of the 

 face, when directed backward often slightly overlaps the " whisker." 



The space between the rami is either of the color of the crown, 

 face or of the front of the neck. As a rule it is a feebly developed 

 region. 



The post-me7ita I space is a subdivision of the foregoing. 



The side of the neck is an important region since the hair is here, 

 as a rule, longer and coarser than elsewhere. The clumps usuallv 

 described as " shoulder tufts," belong to the side of the neck. But 

 the tufts are rarely differentiated. They are well .seen in Cephalotes 

 peroni and Cynopterus marginatus. In most examples the entire 

 cervical region is occupied with hair of a special character and, as 

 already remarked, may be continuous with the hair in front of the 

 auricle. 



The hair oit\\e front of the neck in marked contrast tQ that of the side 

 is almost always thinner and softer and may be almost absent. Of a 

 shade in common with that of the side it is often of a hue which re- 

 sults from a mixture of this shade with that of the front of the 

 trunk or space between the rami. 



In like manner the back of the neck is a weaker region than the 

 side. Usually marked with the same colors as the side it mav be 

 continuous with that of the back of the trunk or of the occiput. 



The base of the prebrachium is not to be confounded with the low- 

 er part of the side of the neck where it forms the so-called shoulder- 

 tuft. The hair usually forms a clump on the ventral side of the pre- 

 brachium near the shoulder. It may be an extension of the color 



