336 
Mr Thursfield gave an account (Proc. Zoological Society 1831, 
p- 66) of how a gentleman rearing a pair of tame rabbits, placed 
them, when about two months old, with a young buck hare 
of about the same age, which became as domesticated as its 
companions. When the doe rabbit was old enough, she had by 
the buck rabbit and the hare a litter consisting of three young 
ones, in all respects resembling the mother and the buck rabbit, 
and three males, two of these latter dying, while a third, which 
was a female, was reared with the rabbits of her own age, and 
when six months old producing one young one. She subse- 
quently bred eight times with tame rabbits and once with a 
wild one. She died in the society’s possession, and Mr R. Owen 
reported that its size and colour were those of a hare, but its 
hind legs agreed more with a rabbit. And it has been 
frequently demonstrated that the cross between the hare and 
the rabbit is fertile, with either of the parent species. 
Experiments made in the Agricultural Institute of the 
University of Halle, since 1881, have shown that hybrids be- 
tween the jackal and the domestic dog are capable of 
reproduction, not merely with individuals of pure blood, but 
also among themselves. 
Mr Bartlett observed (Proceedings Zoological Society) that in 
the bear-pit in the Regent’s Park Zoological Gardens a male 
American black bear, Ursus Americanus, had been kept for some 
time with a female of the European brown bear, U. arctos, and 
on December 31st the latter had three young. At five weeks 
the two which survived were a male and a female: they were 
as large as a common rabbit. The number and situation of the 
teats were somewhat remarkable. They had six situated 
between the front legs and two in the hinder part of the 
abdomen. 
Dr Hoffmann, at a meeting of the Zoological Society held on 
April 7th, 1870, recorded an instance of supposed hybridism 
between a house cat and a lynx, Felis rufa, which occurred in 
the Arizona Territory (P.Z.S. 1870, p. 380). 
The female tiger, Felis tigris, has been crossed with the 
lion, F’. leo, while in captivity; and the male jaguar, F’. onca, 
