Sep., 1889. 
REPORTS OF SOCIETIES. 
219 
ground also contains numerous fluid cavities, mostly minute, 
and some bands traverse the whole which have a dusty 
appearance, with a low power, but show themselves as due 
to minute flakes of irregular shape and brownish colour, when 
a power of about 400 is applied. These bands cut across the 
grains of the ground, and, indeed, are broader than the 
average size of them, so that they are probably cracks 
produced and filled up subsequently to the original meta¬ 
morphism of the rock. A little apparently rectangular 
cavity was observed, lined with a number of little orange 
needles, which, on examination, proved to be quartz crystals 
stained with iron oxide, and frequently traversed by fine 
greenish-brown needles apparently of tourmaline. 
I have compared with this specimen some sections of 
“ Scliorlaceous Elvan ” from Cornwall, which Mr. Allport 
gave me some time ago. The similarity is very great, except 
that the process of alteration has gone further than in those 
in which the outline of the felspar portions were still visible 
(the structure was micro-granitic). 
The porphyritic granite, of which mention was made 
(No. 14) only differs as a hand specimen from the last 
previously described in the occurrence of large porphyritic 
crystals of felspar, some being as much as lin. long. In 
other respects, such as the grey ground, the porphyritic 
quartz grains, and the plentiful occurrence of tourmaline 
aggregates, there is no difference. 
Shells from Ireland.— Mr. G. W. Mellors, of Nottingham, who 
has recently visited our sister island, has sent me a small batch of 
shells which lie collected there, and which may be placed on record, 
as Ireland is a country comparatively unknown to concliologists 
interested in the chorology of our land and fresh-water forms. From 
Roundstone, in Co. Galway: Helix ericetorum (Mull.) with its vars., 
vionozona (Pasc.) and alba (Charp.), Helix virgata (Da. Costa) with 
vars. albicans (Gratel) and lutescena (Moq.), Helix nemoralis var. 
libellula (Risso) 00300, var. carnea (Roebuck and Taylor) 00300, and 
var. Petiveria (Moq.) 12345; from Westport, in Co. Mayo: Helix 
rufescens (Penn) and var. alba (Moq.), Clausilia rugosa (Drp.), Pupa 
umbilicata (Drp.), and Helix rupestris (Drp.).—J. W. Williams. 
Reports of Societies. 
BIRMINGHAM NATURAL HISTORY AND MICROSCOPICAL 
SOCIETY. —Microscopical Section, July 2nd. Mr. W. B. Grove, 
M.A., in the chair. Mr. J. E. Bagnall, A.L.S., exhibited a number of 
