a eee E 
1886. ] Embryology. 395. 
ed some time since in a foreign journal, seems to us of such 
unusual interest that we render in English the author’s text in 
full as follows: 
able at that, from the zo0logical gardens of Holland and Germany 
in the course of years, I resolved to attempt to rear these animals 
at Erlangen. 
“ More than two years since, I obtained eight young Brazilian 
opossums, which promised to do well, but all of which died, one 
after the other, before they were full grown. Last autumn, how- 
ever, I obtained, through the kind efforts of Mr. Karl Hagenbeck, 
of Hamburg, a large number of the hardy North American opos- 
sum; in a warmed and well-ventilated stable, these animals, 
which were well fed, survived the winter remarkably well, and all 
artificial interference had to be resorted to, a description of 
waich is not in place here. Nor would I anticipate the complete 
“1. In each spermatoblast of the male, two spermatozoa are 
rapon, which, however, remain united for a remarkably long 
he mature spermatozoa, which are taken from the 
~ Vagina of the female immediately after copulation, are almost all- 
Such twin-cells with double flagella; only after some time do they _ 
vibrat; € as a consequence of the remarkably strong and rapid o 
w ons of the flagella—they are literally thus torn apart. a 
2. The rutting period of the female occurs at night and dur- 
ri ; one i "a 4 
` tralila die Entwickelung des Opossums (Didelphys virginiana). Biclog, Com 
na V, No. 10, 1885, pp. 294-295. 
TENS 
