264 SEXUAL SELECTION : MAMMAT.s . Pari II. 
daugerous to man as one at the age of six or seven 
years.®® 
In the full-grown male Babirnsa pig of Celebes 
(fig. 64), the lower tusks are formidable weapons, like 
those of the European boar in the prime of life, whilst 
the upper tusks are so long and have their points so 
much curled inwards, sometimes even touching the 
Fig. 64. _ (Skull ol the Babirusa Pig (fiom Wallace’s ‘Malay Archipelago’) 
forelieacJ, that they are utterly useless" as weapons of 
attack. They more nearly resemble horns than teeth, 
and are so manifestly useless as teeth that the animal 
was formerly supposed to rest his head by hooking them 
on to a branch. Their convex surfaces would, however. 
Brehm, ‘ Thierleben/ B. ii. s. 729 732. 
