62 
Annals of the Transvaal Museum. 
On breeding experiments with Gysticerctis 
tentiicelltss Bud. from Sheep, and their 
development into mature Taenia marginata 
Batsch in the South African Jackal. 
By Lewis Henry Hough, Ph.D. 
At post-mortems of sheep made last year at the 
Bacteriological Laboratory at Daspoort, the presence of 
Cysticerci much resembling Cysticercus tenuicollis Rud. was 
found with great regularity in most animals examined, and 
it was considered desirable to settle the question which species 
they really belong to. 
By the kindness of Dr. Gunning, a jackal from the 
Zoological Gardens was placed at my disposal on October 
30th, 1907, to serve as host in experiments to be made with 
the worms. The animal was dosed with arecolin and calomel. 
Ho signs of a previous infection were then observed. 
The first two Cysticerci were given to the jackal on 
4th November, 1907, a further one being administered 9th 
November, 1907, and a last one 11th November, 1907. The 
jackal taking them either wrapped in meat or free. I am 
indebted to the kindness of Dr. Theiler, the Transvaal Govern- 
ment Bacteriologist for the Cysticerci. 
Three months after the first infection, on 3rd February 
1908, the jackal was slaughtered, and a post-mortem made; 
two mature specimens of Taenia marginata Batsch being found, 
besides a number of specimens of a Dipylidium. 
The worms agree in every detail with the descriptions 
as given in the text-books, except that they are somewhat 
shorter than would be normal. 
However, the number of hooks, size of ova, number of 
diverticula of the uterus, etc., and the projection of the hind- 
edge of the proglottids are ail as in normal specimens. 
An earlier experiment with C. tenuicollis was made with a 
bladderworm taken from a Thar, on 15th August, 1907, and 
fed to a jackal, the host being slaughtered 20th October, 1907. 
The worm in this case was not quite mature when taken from 
the host. 
