Zoological Society. 305 



animals of different sexes were kept apart until they had become 

 in some measure accustomed to the gaze of visiters, and reconciled 

 to their new abode. 



" It was to be expected that some accidents would occur in ex- 

 posing so timid an animal, and one whose locomotion is of so violent 

 a kind, to this change; and shortly after their arrival one of the fe- 

 males died in consequence of leaping against the wire fence. It is, 

 however, probable, from the appearances observed on the post mor- 

 tem examination of subsequent cases, that this, like the other indi- 

 viduals, was rendered highly excitable by great determination of 

 blood to the brain. When the remainder had become more ha- 

 bituated to their new circumstances, the experiments were com- 

 menced, and the first step taken was to examine the pouches of all 

 the females. 



"The 1st female had previously been kept at the Gardens, and 

 had a young one, which measured about 1 foot 2 inches from the 

 nose to the root of the tail: this, of course, had quitted the nipple 

 and the pouch, and now only returned occasionally to suck. There 

 was no other young one in the pouch. The right superior nipple 

 was the one in use ; it was nearly 2 inches long and 4rd of an inch 

 in diameter, the gland forming a large swelling at the base. The 

 other three nipples were everted, and about ^ an inch in length. 



" A 2nd female, from the Farm, had a young one attached to the 

 lower nipple on the right side. It measured about 7 inches from 

 the nose to the vent, was naked, with the skin of a bright pink 

 colour, being still, in the language of M. De Blainville, a mammary 

 foetus. The nipple in use was 1-^ inch long from the gland to the 

 mouth of the fcetus ; the rest were everted, and about the size of 

 those in the first-mentioned female. 



" The 3rd female had a mammary fcetus, about 4 inches long from 

 the nose to the vent, adhering to the left lower nipple, covered like 

 the preceding with a naked vascular integument, which probably 

 assists in oxygenating the blood. The eyes in this, as well as in 

 the preceding, were closed. The other nipples were everted, but 

 were not all of the same length, the right lower nipple being shorter 

 than the right upper one. I could not ascertain when this female 

 had been impregnated. 



" The 4-th and 5th females had no young in the pouch ; all the 

 nipples were everted. 



" From this examination two facts were ascertained ; 1st, that the 

 Kangaroo, at least in a state of captivity, has no particular period 

 or season for breeding ; and 2nd, that the upper as well as the lower 

 nipples are used both during the period of mammary gestation and 

 for the young animal's subsequent supplies of nourishment. 



" With respect to the female No. 2., the following facts relative 

 to her gestation were obtained from Joseph Fuller, Head Keeper at 

 the Farm. She received the male on the 14-th of September 1832; 

 but copulation might also have occurred previously. On the 1 1th 

 of October of the same year Fuller observed her looking sickly, and 

 when the male approached her she scratched and repulsed him. 

 Third Series. Vol. 4. No. 22. April 1834. 2 B 



