694 PRIMATES 
at Old Calabar, and is very rare, only a few individuals having as 
yet been met with. Vertebrae: C 7,D 15,L. 7,8 3,C 9.1 
Family TARSIUD. 
Dentition: i 2, ¢ 4, p 3, m 3; total 34. The first upper 
incisor large, and in contact with its fellow of the opposite side. 
Canine of moderate size. Molars with numerous pointed cusps. 
Lower canine semi-erect, its apex diverging from that of the single 
incisor. First lower premolar smaller than those behind it. Orbit 
to a large extent separated from the temporal fossa by a bony 
partition. Fibula slender, with its lower half confluent with the 
tibia. Second and third digits of the hind foot with compressed 
claws ; all the other digits of both feet with flat nails. Calcaneum 
and navicular bone of the foot elongated as in the Chirogales and 
Galagos, but to a still greater extent. Colon short and not folded. 
Vertebre : C7, D 13, L 6,8 3, C 27. 
Tarsius.2—The family contains the single genus Tarsius, of 
which but one species is known, 7. spectrum, the Tarsier, a very 
singular little animal, rather smaller than an English squirrel, with 
very large eyes and ears, a long thin tail, tufted at the end, and 
immensely elongated tarsal portion of the foot, in allusion to which 
its generic name was given to it. It inhabits the forests of many 
of the islands of the Indo-Malayan archipelago, including Sumatra, 
Borneo, Celebes, and some of the Philippines, feeds chiefly on insects 
and lizards, sleeps during the day, but is tolerably active at night, 
moving chiefly by jumping from place to place, an action for which 
the structure of its hind legs, which present a curious resemblance 
to those of a frog, seems particularly well adapted. It is rare, not 
more than two being generally found together, and only brings 
forth one young ata time.? 
Family CHIROMYIDE. 
Dentition of adult: 7 4, ¢ 3, p $, m3; total 18. Incisors very 
large, compressed, curved, with persistent pulps and enamel only in 
front, as in Rodents. Teeth of cheek series with flat, very indis- 
tinctly tuberculated crowns. In the young the first set of teeth 
more resemble those of the normal lemurs, being i 2, ¢ 3, m 2, all 
very small. Orbit surrounded by a ring of bone posteriorly, beneath 
which it communicates freely with the temporal fossa. Fibula well 
1 For the anatomy of P. potto, see Van der Hoeven and Van Campen (Ontlced- 
kundige Onderzock van den Potto van Bosman, 1859) for P. calabarensis, Huxley, 
Proc. Zool. Soc. 1864, p, 314. * Storr, Prodromus Meth. Mamm. (1780). 
3H. Burmeister, Beitriige zur niéihreren Kenntiiss der gattung Tarsius, 1846, 
