389 
fibre, &c., by the penetration of their points into such foreign 
substances. It seems not improbable from their association 
Ne \ 
AN 
Ny 
\ * 
\ 
FIG.S. FIC. &. \ 
that these oblong bodies may be connected genetically with 
the little infusorian parasite. For the infusorian I propose 
the name Undulina ranarum. I have not been able to find 
any record of its occurrence hitherto, though I cannot but 
think it extremely likely that it has been seen and described. 
Undulina is a mouthless infusorian, closely allied to the 
Opalinide, from which, however, it differs essentially, as 
well as from the Infusoria ciliata generally, in possessing no 
cilia. In Undulina a wide flattened portion of the infusorial 
sac produced into a ribbon-like flagellum takes the place of 
cilia. We have indeed here an exemplary case of an “ undu- 
lating membrane.” On this account Undulina must be sepa- 
rated from the other Infusoria, logically indicating a new 
group of these animals characterised as devoid of mouth (as is 
Opalina) and devoid of cilia, but provided with a broad 
crest-like undulating membrane. 
_ On the CrrcuLation in the Wines of BuattTa ORIENTALIS 
and OTHER Insects, and on a NEw Meruop of INJECTING 
the VessEts of Insects. By H. N. Mosexey, Radcliffe 
Travelling Fellow, Oxford Univ. (With Plate XVII.) 
Wuutst working in the laboratory of Prof. Ludwig, at 
Leipzig, this spring, I obtained a number of specimens of 
B. orientalis, to look for nerve-endings in their salivary 
glands. I happened to examine their wings under the micro- 
scope, and finding a remarkably perfect circulation in them, 
was led to examine the wings of other insects, and study the 
subject somewhat closely. Several observers who have 
written on the circulation of insects have given lists of the 
insects in which they have observed the phenomenon. 
