SPOLIA NEMORIS. 83 
have been observed to occur; in no month have they been 
deficient. My different correspondents have come to the same 
conclusion as soon as the material they brought together 
became more extensive, and allowed them to compare the 
results of different months.! 
Another general conclusion, which has more especially been 
verified for Tupaja and Tarsius, is that pregnancy is repeated 
at rapid intervals, very early stages of development being often 
found in the same uterus simultaneously with the yet indubi- 
table remains of a preceding pregnancy, as judged from the un- 
mistakable traces of a preceding placentation, from the nature 
of the uterine wall and the uterine vessels, &c. 
In the case of Galeopithecus it twice occurred that a young 
animal was yet being suckled by the mother and was found 
attached to her breast, whereas autopsy showed an already 
fairly advanced younger foetus to be present in the uterus of 
the same specimen. 
The fact that all the species here mentioned bring forth only 
one young ata time (Tupaja, which regularly carries two foetus 
simultaneously, alone excepted) may perhaps account for the 
prolific properties here referred to, being developed as a counter- 
balancing agency to this restriction of the number contained in 
one litter. In our European Insectivora, whose time of repro- 
duction is limited to only a few months or even weeks in the 
year, the litter normally amounts to eight (Sorex) or six 
(Erinaceus, Talpa) young ones. 
Of all the cases that have as yet come under my observation 
I know of only one case of twins in Nycticebus. They were 
enclosed each in a different horn of the uterus, whereas in the 
normal cases one of the two horns is always barren. 
In Tarsius, Galeopithecus, and Manis I have never noticed 
more than one young at a time. In Tupaja never more and 
1 It should be here noted that I have on more than one occasion heard it 
reported by sportsmen and natives that for the Indian deer, periods of 
heightened and lessened sexual activity do exist. I will by no means gene- 
ralise any further than my acquaintance with the species here investigated will 
allow me to do. 
