MAMMALIA. 
13 
SlMIID^E. 
1 Troglodytes niger. Dr. D. Embleton has dissected a young Chimpanzee, 
and arrived at the same conclusions as others, viz. that it is not, properly 
speaking, quadrumanous, but that it possesses four prehensile extremities, 
two hands and two feet, and that its brain differs from that of man only in 
size and weight. Prof. Wyman’s paper in Proc. Dost. Soc. v. p. 274 is not 
referred to. Nat. Hist. Review, 1864, p. 250.' 
Jlylohates lar. Colonel Tickell makes interesting observations on the habits 
of the Gibbon in a free state and in captivity. It is found in great abundance 
in all the forests skirting the hills which run from north to south through 
the province of Tenasserim. They ascend the hills themselves up to an 
elevation of 3000 to 3500 feet, and are usually met with in parties of from 
eight to twenty individuals. This species extends southward to the Straits, 
and northward to the northerly confines of Pegu. To the west of the spur 
dividing British Burma from Arakan, and throughout the latter province into 
the mountains east of Chittagong, is found only Hylohates hooloch. Journ. 
As. Soc. Beng. 1864, p. 196. 
4 Macacus cyclopis. Dr. Sclater mentions and figures the most extraordinary 
development of the cutaneous parts round the vulva, extending over a great 
part of the lower base of the tail. Proc. Zool. Soc. 1864, p. 710. 
CEBIDiE. 
Mycetes seniculus. Mr. Flower has described and figured the brain of this 
species, which was unknown before, and exhibits some remarkable features. 
It is only of the weight of the entire animal ; the sulci are distinct and 
deep, but tolerably symmetrical, not numerous or complex, and with very few 
secondary grooves. It is distinguished by an excessive prolongation of the 
Sylvian fissure, the absence of the angular sulcus and of any well-marked 
external and internal perpendicular fissures, and the simplicity of the calcarine 
fissure. It is one of the lowest forms of brain among the New World Apes, 
which show a great diversity in this respect. Taking Cehus as the form in 
which the type of brain of the Old World Apes is precisely repeated, we find 
in Ateles a modification in the ascending direction, whilst Fithecia, Callithrix, 
NyctipitliecuSy and more especially Mycetes most remarkably depart from the 
ordinary type seen in the order. It is worthy of remark that the mental 
characteristics of the Howlers are in accordance with the structural peculi- 
arities of their brain ; they are surly and untameable, and their intelligence is 
far inferior to that of Ateles. Proc. Zool. Soc. 1864, p. 335, pi. 29. 
' \ Ateles heelzehidh. Hyrtl describes the retia mirabilia in the extremities. 
Denkschr. Acad. Wiss. Wien, 1864, xxii. p. 122. 
Fithecia satanas. Dr. Sclater has figured a young example of this species 
in Proc. Zool. Soc. 1864, p. 712, pi. 41. 
Lemurid^e. 
Mr. Mivart has examined the sknlls of numerous species of 
this family with the intention of finding characters by which the 
smaller forms can be more clearly defined and arranged. Proc. 
Zool. Soc. 1864, p. 611. He gives detailed descriptions of the 
