PROCEEDINGS OF SOCIETIES. 97 
Ceenuri from the rabbit so far back as the year 1833. He had, 
indeed, mentioned the fact to me at the Cambridge meeting of 
the British Association, two years ago, but I could not, at that 
time, look fully into the matter. I further understood that Prof, 
Owen had doubted the correctness of Mr. Rose’s interpretation 
of the facts observed. On comparing the facts as described in 
the original paper (published in the ‘London Medical Gazette’ 
_for November 9, 1833) with those observed by myself in the 
Coenurus of the Lemur, and with those observable in the speci- 
mens now before the Society, I have no hesitation in saying that 
not only does a third kind of Ccenurus exist, but the priority of 
the discovery of the second kind of Ccenurus is due to Mr. Rose. 
How many kinds of Cenuri may yet turn up, and how many 
specific tapeworm-forms they collectively represent, it is impossi- 
ble to say ; but my own examinations of, at least, three kinds of 
Ceenuri have led me to believe that they represent three se- 
parate species of Tenia. Proof on this score can only be obtained 
by future breeding- -experiments. The study of Mr. ‘Rose’s paper 
farther led me to look into Numan’s elaborate Dutch memoir 
(“ Over den Veelkop-blaasworm der Hersenen”’), in which I find 
he has made frequent reference to Mr. Rose’s paper, as well as to 
the earlier writings of Owen, Gulliver, Busk, Goodsir, and other 
English authors. As regards the Coenurus in question, he merely 
gives the facts recorded by Mr. Rose; but he notifies the in- 
teresting circumstance that a veterinary surgeon of Burgau, 
Engelmeyer by name, has also found a Coenurus in the liver ‘of a 
cat. Numan Says the Coenurus (“De Vee-arts wil den Veelkop 
gevonden hebben”), by which expression, as also by others else- 
where given, I conclude that the existence of a second, specifically 
distinct form of Ccenurus never once entered his mind. Be that 
as it may, he has done full justice to Mr. Rose and other English 
writers who have investigated the structure and economy of the 
hydatids and their allies. 
From a microscopic examination of the specimens of the 
Ceenuri from the Squirrel, it would 
seem that these last undescribed poly- 
cephalous bladder-worms represent a 
kind of intermediate type between 
the ordinary brain-Coenurus and Echi- 
nococeus properly so called. At all 
events, in place of separate heads 
(scoleces) in groups irregularly massed 
together as in Cenurus, | find bundles 
of heads, so to speak, forming small 
nodules, which are often arranged in 
: =; 3 A moderate-sized Canurus cuniculi, 
a linear manner. There 18, on the with daughter-vesicles proliferating 
other hand, no evidence of a true &xternally.—Rosz. 
brood-capsule, such as we find in 
Echinococcus ; but the formation of daughter-vesicles, by the 
exogenous method of budding, reminds one of the ordinary 
VOL. V.—NEW SER. G 
