363 



At the middle line of the head from before backwards 

 the two areas of the right and left sides are separated as 

 follows: — The area A shows no middle line demarcation, the 

 tracts of the two sides being continuous over the bridge of the 

 nose. A well-marked ridge of convergent hairs separates the 

 two . areas marked B. A backwardly-directed stream line 

 separates the two areas indicated as C. Upon the middle 

 line of the muzzle, between the areas B and C, is a con- 

 vergent interval, and between areas C and D is a divergent 

 interval, forming conspicuous landmarks. Upon the crown of 

 the head a radiating divergent centre is situated, almost mid- 

 way between the auricles; from this centre the hair is 

 distributed in the area D. 



Upon the face, at a lower level on the muzzle than the 

 area A, is a hair field, E, occupied by hairs which stream down- 

 wards and backwards from the rhinarium along the upper lip. , 

 In this area the mystacial sensory vibriscae are situated. This 

 field runs backwards, and without any obvious line of 

 demarcation, joins a tract of caudally-directed hairs which 

 stream around the lower margin of the orbit, diverging from 

 the stream C at the anterior (inner) canthus of the palpebral 

 fissure. Upon the lower jaw the hair is directed uniformly 

 backwards, and at the angle of the mouth this stream becomes 

 confluent with the sub-ocular stream (E) of the upper jaw. 



Behind the orbit is a somewhat complicated convergent 

 region in which the sub-ocular stream runs both upwards and 

 downwards to meet a radiating stream which runs forwards 

 from the anterior margin of the auricle. This pre-auricular 

 stream also runs downwards and meets, at a convergent line, 

 the mandibular stream which is directed backwards. The 

 general line of convergent streams runs downwards and 

 forwards over the cheek and to the lower jaw near to its 

 angle. 



Upon the body and limbs (see fig. 2) the hair disposition 

 is, on the whole, extremely simple. There is a uniform body 

 flow directed ventrally and caudally, and a uniform limb 

 distribution having a ventral and post- axial trend. There 

 are no hair reversals upon the limbs, and no whorls or 

 partings upon the body. 



Hair is continued to the extremity of the ungual phalanx 

 of both fingers and toes; the heels are hairy. 



The hair when first uniformly distributed over the body is 

 almost black in colour ; but when the young leaves the pouch the 

 dorsal surface is black-brown and the ventral parts bright- tan. 



The Chest Gland. — At no stage have I been able to 

 recognize in any of the young specimens that I have examined 

 any naked-eye trace of the "chest gland" said to characterize 

 the adult. 



