542 MR. W. A. FORBES ON ANTILOCAPRA AMERICANA. [NoV. 16, 



horos, drawn of half the natural size, so far as the movements of 

 the animal allow this to be done. The base of the newly uncovered 

 horn is thicker and larger than the top part, and is of a different 

 texture, being greyer and pretty thickly covered with long, whitish, 

 closely appressed hairs. The integument is rather soft and decidedly 

 warm to the touch ; and growth is evidently going on here at a 

 rapid pace. The top part, about one inch long, is smoother and 

 blacker, though nearly white at the tip. It is nearly glabrous, with 

 only a very few small hairs, and has the appearance and touch of 

 ordinary horn. It is separated from the basal 'pedicel' part by a 

 slight constriction, and is rnovuble on this part in a slight degree from 

 side to side. 



Fig. 3. 



Horn of Prongbuek, one montb after the sliedding of the old horns : 



4 nat. size. 



" Fig. 3 shows the condition of the horns today (November 16), 

 exactly four weeks after the shedding took place. As will be seen, 

 the horns have grown rapidly, and have already acquired a charac- 

 teristic inward curve. The hair-covered ' pedicel ' and the black 

 apical part still retain their original character unaltered ; and all the 

 increase of length in the horn is due, as far as I can make out, to 

 the lengthening-out of the 'node ' (to use a botanical term), which is 

 marked off as a slight constriction on the fresh horn (vide fig. 2). 



