1897.] OF HAIE trPOH THE flUJIAIJ EAft. 305 



iv. Ears of Quadrumana. 



In the hope o£ discovering the law of growth followed hj these 

 hairs the ears of various Apes and Monkeys have been examined. 

 The drawings for figs. 20-37 (Plates XXI. & XXII.) were made 

 at different times and in most cases under circumstances which 

 made a common scale impossible, for speciuiens sealed up in 

 bottles cannot readily be measured, nor will some Monkeys endure 

 handling. Fig. 32 was drawn from a Monkey upon an organ in 

 the street, and I have no idea of its scientific name. The ear of 

 the Aye-Aye (Cheiromys), fig. 37, was drawn from a skin. As a 

 rule I have not trusted to skins, the ears upon which are apt to 

 contract in drying ; their true shapes and positions must then be 

 matters of conjecture and the original direction of the hairs upon 

 them is not preserved. 



The ear of Hylobates Jwoloch (fig. 20) is imbedded in deep 

 black fur and hardly visible to casual observation. It is as nearly 

 naked as can be, having few, if any, traces of hair or down upon 

 the smooth black skin of the back of the concha and helix. Upon 

 the folded margin of the upper edge of the ear are a very few fine 

 hairs of no describable colour directed towards the region where the 

 point of the ear presumbly once was, for no trace of a point, cusp, 

 or nodule remains. This ear is sessile, fittiug closely to the head. 



Oi-ang. — The ears of a young male specimen dried and salted in; 

 the collection of the Zoological Society were hairless. The head, 

 trunk, and limbs were covered with long red hair. 



Troglodytes calvus (" Sally ")•— As figured by Mr. F. E. Beddard 

 in his monograph, the ears of this species are hairless and show 

 little or no indication of a point. 



Troglodytes niger (fig. 21, 22, 23). — The ears of young Chim- 

 panzees in the Zoological Gardens, 21 and 22, have no indications 

 of any point, a very few small hairs upon the upper, fold and a 

 few more upon the lower edge directed towards one another as 

 is usual. Backs almost hairless. 



rig. 23. — An ear in spirit in the Oxford University Museum 

 showed no rudimentary point and bore a few fine hairs upon the 

 upper fold only ; direction as usual. I could not examine the back. 



The ears of a Gorilla in the same museum (figs. 24, 25) showed 

 some faint indication of a point towards which the small hairs 

 were directed. In the immediate neighbourhood of what I took 

 to be the rudimentary point the hairs were fewest and their 

 direction most indefinite. The hairs upon the folded margin of 

 the helix curled inwards as in the human ear and the few stronger 

 and darker hairs upon the back of the upper ear pointed towards 

 the edge. 



Cynocephalns (fig. 26). — This has a distinct though blunt point 

 which is bare. The hairs upon the folded upper helix are directed 

 strongly to this point, those which fringe the lower helix are less 

 noticeably directed. 



Almost the same remarks apply to the ear of Cercopithecus 

 cyjiosurus (fig. 27). 



