234 
Mr. Home's Observations on the 
When the foetus first adheres to the nipple, the face appears 
to be wanting, except the round hole to receive it ; and as the 
jaws and lips grow, they cover a greater length of the nipple, 
giving the mouth a better hold ; the upper surface of the 
tongue, as that organ grows, is concave, adapting it to the nip- 
ple which lies upon it. The growth of the foetus is distinctly 
seen in the annexed drawings. 
From the peculiarities in the structure of the female organs 
of the kanguroo, it is evident they must, in their mode of ge- 
neration, materially differ from other quadrupeds. 
The semen of the male passes in a circuitous way through 
the lateral canals to the cavity of the uterus, and from the 
structure of the parts, can neither enter the fallopian tubes, nor 
readily return to the vagina. 
The embryo, in its passage from the ovarium along the fal- 
lopian tube, will be enveloped in the gelly formed in the oval 
glandular enlargement of that canal, and in this state depo- 
sited in the uterus, where it will come in contact with the se- 
men of the male. 
This differs from other quadrupeds, but exactly coincides 
with all those animals whose foetuses are detached ; the semen 
being retained in the lower part of the oviduct, where it comes 
in contact with the egg when completely formed. 
1795, a foetus taken from the false belly* smaller than any that had been met with. It 
weighed z 1 grains at the time it was taken from the false belly, and was less than an 
inch in length. Its fore-paws, while of this size* were equally well formed to appear- 
ance as in the foetus above described, and double the length of the hinder ones, but 
the mouth had evidently less width. The nipple to which it had been attached did not 
accompany it. 
It would seem probable,' that the mouth of the foetus is originally attached to the 
nipple by means of the gelatinous substance contained in the uterus. 
