T9i6. 
Phillips —Fossil Pisidia new to Ireland. 
P. siipinum in a box of shells from Grays, Essex, sent him 
by Mr. A. S. Kennard, and I have found it in a mixed 
lot of fossil Pisidia from Crayford, Kent, lately received 
from Mr. J. E. Cooper. 
On the Continent it lives in Denmark and Sweden. 
Danish specimens kindly sent by Mr. Woodward to Mr. 
Stelfox resemble closely the Irish shells, but appear to 
belong to a lacustrine rather than a river form. 
The New Ross specimens are mostly of a reddish or 
chocolate colour and look as if washed out of a very old 
deposit. Some of those from the Suir are very much, 
thickened and thus correspond with the heavy P. cascrtanum 
and P. amnicum with which they are associated. Many 
from the Shannon and Suir are very perfect, having all 
the appearance of drift-shells only recently killed ; it is, 
therefore, very likely that the species will be found living 
in some of, if not all, the rivers mentioned. 
For assistance and suggestions in the preparation of 
this paper, as well as for the accurate and artistic drawings 
which constitute the plate, my sincere thanks arc due to 
Mr. A. W. Stelfox. 
DESCRIPTION OF PLATE II. 
Pisidium sitpiniun .\. Schmidt. 
Fig. I. Right valve from the Suir near Fichlown, about two-tliirds 
full-grown. 
Fig. 2. Left valve from the Suir near Ficklown, about two-thirds 
full-grown. 
Fig. 3. Posterior view of No. 5 duplicated. 
Fig. 4. Right valve from the Suir near Fiddown, about half full- 
grown. 
Fig. 5. Left valve from the Suir near Fiddown, about one-fourth 
full-grown. 
Fiir. 6. Fxterior view of No. 2. 
Pisidium pnvvuluyn Clessin. 
Figs. 7, 8, q, 10. Exterior and interior views of pair of valves from 
the Suir near Clonmel. 
Figs. II, 12, 13, 14. Exterior and interior views of pair of valves 
from the Shannon near Limerick. 
Ashburton, Cork. 
