ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 
41 
New Human Tapeworm.* — Mr. IT. B. Ward has a preliminary de- 
scription of a new human Tsenia, of which two examples have been 
found. It is proposed to call the new species T. confusa. The terminal 
joints are 27-35 mm. long, and 3 * 5-5 mm. broad. This length is, of 
course, considerably greater than that of the joints of the two common 
tapeworms which infest mankind. The scolex has four suckers and a 
retractile rostellum, which has six or seven closely set rows of small 
hooks. It is to be hoped that other practitioners will keep an eye on 
this parasite, and give us a fuller knowledge of it than we have at 
present. 
Remarkable Pseudhelminth.f — M. A. Bavay gives an account of a 
remarkable form which was found in the fasces of a patient. The bodies 
found had the form of brown, jointed ribbons, wider at one end than the 
other, which became almost transparent. Each ring, or what appeared 
to be a ring, carried a pair of curved short feet. The only questions 
that suggested themselves were — are these marine annelids, or are they 
myriopods? They were, of course, nothing of the kind. By a happy 
thought the author recalled the relatively large lingual ribbon of the 
limpet, and this is what they were ; the patient had eaten limpets and 
digested their flesh, but the horny and spiral radulse had merely become 
unrolled. 
Rotatoria. 
Notommata wernecki. J — Prof. W. Rothert describes this form, 
which makes galls on VaucJieria- filaments, as has been known since the 
beginning of the century. To Balbiani’s careful description (1878) the 
author has some results to add. The masticatory apparatus is not reduced, 
and the unci may be seen protruded from the mouth. Entrance into the 
filament seems to be effected by the growing point. The parasite eats 
not only the colourless protoplasm, but also fat-drops and chlorophyll 
grains. The females cannot complete their development outside of the 
galls. As Balbiani observed, the same female may lay summer and 
winter ova. The winter ova have a delicate external and a firmer internal 
envelope, the latter formed some time after laying and alone persisting 
during the resting period. Only a few winter ova are produced, but 
over sixty summer ova may be laid by one female. In favourable condi- 
tions, not wholly dependent on temperature, summer ova as well as 
winter ova may be produced in late autumn and winter. In winter ova, 
segmentation occurs immediately after laying ; before it stops the inner 
envelope is formed ; during the resting period the egg contains a fairly 
well-developed embryo. This is probably true of other winter ova of 
Rotifers. Prof. Rothert was fortunate enough to find the males. They 
are remarkable in having a normal masticating- apparatus, though the 
alimentary canal is rudimentary. They thus approach Seisonidm. 
Female and male summer ova are laid normally by the same female, the 
former usually predominating; and the same is probably true of the 
winter ova. The parthenogenetic development of the male summer ova 
is quite certain, but it is not likely that all summer ova are unfertilised. 
* West. Med. Keview, i. (1896) pp. 35-6 (2 figs.). 
t Bull. Soc. Zool. Franco, xxi. (1896) pp. 162-3. 
% Zool. Jahrb. (Abth. Syst.), ix. (1896) pp. 672-713 (4 figs.). 
