90 A. A. W. HUBRECHT. 
differentiations intended for the future attachment of the 
blastocyst. This proliferation, the products of which undergo 
remarkable further developmental changes, eats its way very 
deeply into the maternal tissue between the tubular uterine 
glands. 
Vascularisation of this proliferated region, which fuses 
in a particular way with the surrounding maternal elements, 
is then brought about, for maternal blood circulates in it 
freely and copiously, and soon another system of vascular 
channels connects the growing embryo with this rich source of 
energy. 3 
A very early and profuse growth of mesoblastic tissue plays 
an important part in this secondary connection between the 
growing foetus and its chorion, and accentuates in a suggestive 
way the several features by which Tarsius approaches the 
Primates. 
However, I shall have to postpone a detailed description of 
this point to a later publication. 
Nycticebus. Figs. 3—5, 22, 23, 30—40, 50—56. 
This second genus of Prosimiz, represented in the Archi- 
pelago by the species Nycticebus tardigradus and N. javanicus,} 
is known by a series of names which have much the same 
sound, but in which the consonants vary according to the 
different regions. These names are—kukang, tukang, pukang, 
and huhang. In East Sumatra and Banka the name of berook 
semoendi is in vogue among the natives. In East Java speci- 
mens were especially difficult to procure because the skeleton 
is said to be most efficacious in bringing about death and de- 
struction among the unfortunate inhabitants of a house in 
‘front of which it has been buried overnight. It is thus in high 
1 Of this species I have obtained but very few specimens in East Java, 
and no pregnant uteri. Although no specific determination was ever made 
by those who so kindly collected and preserved the uteri at present available, 
T have no doubt that they all belong to the only species which is known to 
occur in the islands from which my collections have come (Sumatra, Banka, 
and Borneo), viz. Nycticebus tardigradus, 
