620 SYNOPSIS OF CONTINENTAL VETERINARY JOURNALS. 
Avas readily broken down, and was about two centimetres 
thick. Shortly after the removal a small foetus, imperfectly 
developed and commencing to putrefy, was expelled. The 
mother made a good recovery. M. Cantoni draws our atten¬ 
tion to the fact that though authors of treatises on obstetrics 
have noted the occasional occurrence of a hymen and the 
obstacle which it affords to parturition in primiparee, they 
have not observed cases similar to this one recorded, since it 
occurred in an animal with her second calf. This was 
probably a new growth resulting from vaginitis. This 
case is similar to that recorded by M. Biot in the Archives 
d’Alfort, 10th May, 18T9. 
La Clinica Veterinaria , January, 1879.— On a new 
Species of Tania of the Sheep (Tania ovilla), by Profes¬ 
sor Rivolta, of the University of Pisa.—In 1874, M. 
Rivolta described three species of tapeworm of the sheep, 
which he has distinguished by the position and form of the 
uterus. In the same year he also found in the sheep a 
Taenia, which seemed to him to have strong affinities with 
T. deiiticulata, and he has placed it under that heading, 
but without note of interrogation after it. During the last 
vacation he was visited by Professors Ercolani, Generali, and 
Perroncito. The latter gave him a Taenia of the ox for the 
museum of the school, and he was thus enabled to make a 
comparison with the specimens which he had already col¬ 
lected. Thus he determined that the parasite which he had 
found in the sheep was not to be placed in the species T. 
expansa nor in that of T. denticulata , hut should be considered 
of a distinct species, of which the following is the descrip¬ 
tion :—One of the specimens collected was U20 m. in length 
without the anterior or cephalic portion, so that its full 
length may be reckoned at 1*50 m. The proglottides of the 
posterior part are 6 mm. wide, and 1 mm. long. Each pre¬ 
sents only a single sexual aperture on one of the lateral 
borders ; from this emerges a penis. This opening alternates 
with that of the following segment, i.e. if the one has it on 
the right side, the following one will show it on the left, and 
vice versa. The posterior border of each segment is imperfectly 
distinguishable from the anterior border of the next. The 
lateral margins are tolerably thick and rather white; they 
present two strise, which cut off the more deeply coloured 
margins from the paler central part of the segment. Those 
margins which have a genital aperture are more convex than 
the others. M. Rivolta has not seen the head, but as the 
genital organs have furnished him with specific characters, 
he describes them and appends a figure to his paper. The 
