306 
SEXUAL SELECTION : MAMMALS. 
Part II. 
appearance and disappearance of stripes ; the species of 
Asinus which inhabit the Asiatic continent are destitute 
of stripes, not having even the cross shoulder-stripe, 
whilst those which inhabit Africa are conspicuously 
striped, with the partial exception of A. tdenio^us, which 
has only the cross shoulder-stripe and generally some 
faint bars on the legs; and this species inhabits the almost 
intermediate region of Upper Egypt and Abyssinia.^^ 
Quadrumana , — Before we conclude, it will be advis- 
able to add a few remarks to those already given on the 
to. Head of Senmopitliecus rubicuiidus. This and the following figures (from 
Prof. Gervais) are given to shew the odd arrangement and development of the hair on 
the head. 
« ‘ Proc. Zool. Soc.’ 1862, p. 164. See, also, Dr. Hartmann, ‘ Ann. 
(1. Landw.’ Bd. xliii. s. 222. 
