LEMURS. 
21 
and easily tamed, trained specimens are frequently exhibited 
' alive in this country. 
The last family of the more typical Primates is the Hapalidce [c^se 9.] 
{Nos. 156 - 168 ), or Marmosets, differing from the others by the 
non-opposable thumb, which is provided with a claw instead of 
a nail, the rudimentary great toe, long, hairy, and never 
prehensile tail, and the different number of their teeth. They 
are small animals, some not exceeding a rat in size, of bright 
and varied appearance, many being ornamented with long tufts 
of hair on their ears, and all more or less brightly coloured. 
Marmosets are almost entirely confined to the forests of tropical 
South America, a single species only extending as far north 
as Panama. Well-known representatives are the Common 
Marmoset, Hapale jacclms ( 166 ), and the Pinchi, Midas 
cedipus ( 163 ). 
The second suborder of the Primates — the Lemuroidea — [Cases 
includes a number of Mammals of a lower type than those ^ 
hitherto mentioned, and for the most part natives of Madagascar, 
although a few are found in Africa and Southern Asia. They 
are almost invariably arboreal in their habits, and generally 
have long, bushy, and non-prehensile tails, opposable thumbs 
and great toes, large eyes, and long fox-like faces. From the 
Monkeys they differ osteologically by their longer snouts, 
smaller brain-cases, different dentition^ and also by the sockets 
of the eyes_, with one exception, being bounded on the outside 
only by a simple rod of bone instead of by a distinct bony wall. 
Among the skeletons of the genera exhibited, attention may be 
directed to that of Tarsius spectrum ( 220 ), remarkable for the 
extraordinary prolongation of the bind-foot. In this genus, as in 
Monkeys, the sockets of the eyes are bounded all round by a thin 
plate of bone, and the dentition is I. p, C. P. M. | x 2 = 34. 
In the Aye-aye, Chiromys madagascariensis ( 229 ), the teeth are 
extremely reduced in number, the formula being I. C. {J, P. J, 
M. I X 2 = 18. The incisors are very thick, long, curved, and 
without roots, as in Rodents, while the crowns of the molars are 
flat and smooth. The suborder is divided into families, of which 
the Lemuruhe contains by far the great majority of the species 
