452 PROF. A. H. GARROD ON GELADA RTJEPPELLt. [May 20, 



With reference to the male, its general colour is a dark sooty 

 chocolate-brown. The shoulder, forearm, back of hand, and instep, 

 as well as most of the tail, with the exception of its end, are black. 

 The palest brown is found on the abdomen, though this is very 

 dark. A few white hairs mixed with the brown-black of the tail- 

 tuft give that a lightish tint. The longest hair is that between the 

 shoulders, where it reaches as much as eleven inches. This lengthy 

 hair extends upwards over the occiput quite forward to the super- 

 ciliary ridge, and downwards to the loins, below which it rapidly 

 reduces before the base of the tail is leached. Laterally the long 

 hair extends over the shoulders, and less considerably under the 

 arms, towards the lateral margins and to the surface below the nude 

 chest-space. The hair on the abdomen is about 2'75 inches long, 

 that outside the thighs 4 inches, that on the tail an inch, except the 

 end tuft, where it reaches 3 - 5 inches. 



The characteristic nude chest-space is double in the male, being 

 formed of two median triangular isosceles areas reversely directed, 

 with their apices approximate, but separated by an interval, 1*5 

 inch in length, of hair-covered skin. The base of the very obtuse- 

 angled upper triangle, which is margined by black hair, is five and a 

 half inches from the middle of the lower lip, and is situated opposite 

 the larynx, its length being 3 - 75 inches, and its depth not being 

 more than an inch. The lower triangle is also very obtuse-angled, 

 with its base, slightly concave downwards, six inches long. 



Although the two nude triangles above described do not meet, 

 they tend to form an hour-glass surface of florid skin, 7' 75 inches 

 along each lateral curve from horn to horn. The hair bordering it 

 is an inch long or so and iron-grey in tint, from the almost equal 

 admixture of black and white hairs. There is no carunculation of 

 the skin in the nude spaces or at their borders. The pair of nipples 

 are closely approximate, not being more than a quarter of an inch 

 apart in the dried skin. They are situated in the nude area of the 

 lower triangle, an inch above its base. 



In the female the general tint is much the same as that of the 

 male; the hair is very much shorter and less faded at the tips. 

 The interscapular hair is the longest, reaching nearly four inches, 

 whilst that of the loins is not so black as in the male. 



The pectoral nude space is in the female carunculated all along its 

 lateral and inferior borders. The two triangles which go to form it 

 join apically by an isthmus 1*3 inch broad. The marginal hair is 

 not mixed with white. The caruncles are numerous, and about a 

 quarter of an inch in breadth, being ovate and flattened. The nipples 

 are situated as in the male, and are an inch apart. 



In both sexes the face is nude below the line of the frontal 

 eminences, and laterally from points a little les3 than half an inch 

 outside the outer canthus of each eye, the nude spaces running straight 

 downwards in the direction of the angles of the mouth, just before 

 reaching which they turn and include the chin. 



The ischial callosities, which are subcircular, and a little less than 

 two inches in diameter are situated in a naked area which is carun- 



