5G0 
PROFESSOR W. TURNER ON THE PLACENTATION OF THE APES. 
to which the villus penetrates into the hillock. The darker blue 
colour is in the capillaries of terminal villi adherent to the surface 
of the decidual hillock, and apparently continuous with the villus 
embedded in the hillock. The layer of cells, cc., which envelopes 
the smaller terminal villi, is shown. 
Of the drawings from nature from which these figures are taken, fig. 9 is by myself ; 
for fig. 5 I am indebted to Mr. J. D. Dunlop ; fig. 6 to Alfred H. Young, M.B. ; 
fig. 1 to Dr. J. Halliday Scott; and the remainder to John Haycraft, M.B. 
Appendix. 
(November 30, 1878.) 
During the month of October I received, through the courtesy of Professor A. IT. 
Garrod, the placentae of two other monkeys, the examination of which has enabled 
me to clear up one or two points which I was obliged to leave in doubt in my 
memoir, and to add some additional particulars. 
The one placenta was obtained on October 4th from a Cercocebus fuliginosus, which 
had been impregnated by a Macacus cynomolgus living with it in the same cage. 
The Cercocebus had been well advanced in pregnancy, and had met with her death by 
falling from the topmost bar in one of the lofty cages in the gardens of the Zoological 
Society of London. The other placenta was shed during parturition on October 14th, 
along with a living foetus, by a Cynocephalus mormon, which had been impregnated 
by the same Macacus cynomolgus. 
The placenta of the Sooty Mangeby was contained in the cavity of the uterus, but 
the foetus had been removed before it came into my possession, and a note had not 
been taken of its position in the uterus. The placenta consisted of two lobes, unequal 
in size. The larger, 3 inches in diameter and almost circular, was adherent to the 
posterior wall of the uterus ; the smaller, inches in one diameter by 2 inches in 
another, had been adherent to the anterior wall, but along with the surrounding 
chorion had become detached from it. The two lobes were separated from each other 
by a broad band of intermediate chorion, in which the vessels ramified that passed 
from one lobe to another. The cord was attached to the centre of the larger lobe. 
From the lower edge of this lobe to the region of the os uteri the chorion was closely 
adherent to the inner surface of the uterus. 
The placenta of the female Cynocephalus was single, almost circular in form, and 
measured 3^ inches in diameter. All the membranes had been preserved, and no 
trace of a smaller subordinate lobe was to be seen. The cord joined the placenta near 
its middle. The presence of only a single placental lobe in Cynocephalus mormon is of 
