S92 THE .VN'ATOMY OF VERTEBRATED ANIMAT-S. 



brain. The absolute capacity of the cranium is less than forty 

 cubic inches ; and, if there is any difference in the length and 

 abundance of the hair which covers the body, it is longest on 

 the back. The uterus is undivided, and the clitoris is not 

 perforated by the urethra. The teats are only two in number, 

 and they are pectoral. 



The Siiniadw are divisible into three families — the Arcio- 

 pitheclni, the Flatyrrhini, and the Catarrhiiii. 



1. The Arctopitheoini, or Marmosets, are small, thickly 

 furred, long-tailed, habitually quadrupedal. Squirrel-like ani- 

 mals, which are found only in South America. None of them 

 are provided with cheek-pouches, nor possess bare and callous 

 patches of integument over the ischia. The ears are large 

 and hairy, and the nose is flat and broad as in the PlatyrrhinL 



