141 
Specimens of Hydra with Paramoecium aurelia and Tricho- 
dina pediculus parasitic upon them were shown by Mr. A. 
Brothers. 
February 27th, 1865. 
J. Sidebotham, Esq., President of the Section, in the Chair. 
Exhibitions. 
The shell of an oyster with a thick layer of soft chalk-like 
deposit lining its inner surface. — Mr. Nevill. 
A hall composed apparently of fragments of some vegetable 
fibre felted, from the shore of the Mediterranean at Cannes. — * 
Mr. Sidebotham. 
Flowers of a species of Euphorbia, and a leaf of Cycas. — - 
Mr. Grindon. 
Mounted specimens of the larval shells of Saxicava rugosa, 
Area tetragona, and Ostrea edulis ; also of Lima, Pecten, 
Cardium, and others not yet specifically distinguished, from 
Connemara shore sand. — Thomas Alcock, M.D. 
A series of shells of Helix nemoralis, Helix hortensis, and 
Helix hybrida were shown by Mr. Sidebotham, who stated 
his belief that the two former are good species, and the third 
a true hybrid. 
Communication. 
Mr. G. E. Hunt read the following “ Notes on Mosses/’ 
Campylopus setifolius, Wils.-— This species was described 
by Wilson in his Bryologia Britannica, from specimens 
collected by the late Dr. Taylor on Carrig Mountain, Ireland. 
Since then it has been observed by Dr. Moore, of Dublin, in 
County Wicklow and on Cromaglaun ; by myself, in great 
abundance at Cromaglaun and Gap of Dunloe, Killarney. 
In these stations it is the female plant that we find. In 
