MR. HANCOCK ON THE FRESHWATER BRYOZOA, ETC. 367 
The British Animalcules are very imperfectly understood. With 
the exception of the beautiful tribe of Vorticelle, whose relationship 
is very remote, there are not any published native species bearing 
the least resemblance to those here described. The genus Acineta 
of Ehrenberg comes nearest to them. Acineta mystacina, found 
near Berlin, somewhat resembles our lacustrine species, but its form 
appears to be much more simple, and the tentacles rise irregularly 
from different parts of the body. It is probable, therefore, that 
these animalcules are undescribed, and their discovery is not void 
of interest, on account of their forming a more perfect lnk be- 
tween the Infusoria and the Campanularian zoophytes than any 
hitherto known. 
The great class Infusoria, in its present form, includes a hete- 
rogenous assemblage, which at some not very distant period must 
be broken up ; and it will then probably be found that the infu- 
sory animalcules contain the first rudimentary forms of nearly all 
the invertebrate types. 
XVII.—On the Anatomy of the Nreshwater Bryozoa, with de- 
scriptions of three new species. By AuBany Hancoor, Hsq. 
[Read Wednesday, December 12th, 1849.] 
Durine a ramble made last July, in company with the Club 
to the Northumberland lakes, | was fortunate enough to find two 
or three species of Bryozoa. Since then I have revisited the 
locality twice, and on each occasion additional species occurred. 
Thus six or seven forms of these interesting animals have been 
found to inhabit two of these lakes, namely, Bromley Lough and 
Crag Lough. ‘Three of the species appear to be undescribed ; 
these I propose to characterize towards the close of this commu- 
nication, giving previously an account of the anatomy of the fresh- 
water Bryozoa so far as I have been able to determine it. 
Ad 
