588 CHORDATA. 
Family 1.—Lemuridz.—The true lemurs. Found in Madagascar, 
Africa and the Oriental region. 
Family 2.—Tarsiida.—Comprising only the peculiar little Zarszzs 
of the Malay Islands. Its incisors are?. The proximal tarsal bones are 
elongated and two of the hind-digits are clawed. 
Family 3.—Chiromyidz.—Another aberrant lemur, known as the 
Aye-Aye. It is found in Madagascar, nocturnal and arboreal. It has a 
rodent-like dentition with incisors growing from persistent pulps. Its 
dental formula is 44%. All the digits are clawed but the hallux which 
bears a nail. The third digit of the manus is very long. 
Fig. 394.—LATERAL VIEW OF SKULL OF THE 
AYE-AYE (Chetromys ). 
Note the rodent-like incisors. Dental formula 1943, 
Distribution of the Lemuroidea.—The chief feature of 
the distribution of lemurs is their extraordinary abundance 
in Madagascar. (For an account of this, see page 602.) 
SUB-ORDER II.—ANTHROPOIDEA. 
The Anthropoidea are advanced types of Primates. They 
have a tendency to loss of the pollex; the facial portion 
of the skull tends to recede below the cranial and the 
orbits look more forwards than those of the Lemuroidea, 
being also completely separated from the temporal fosse by 
a bony partition. The lacrymal foramen in all Anthropoidea 
opeas inside the orbit. ‘The brain is of a higher type, the 
