ON EXCAVATIONS IN THE PALMOZOIC ROCKS OF WALES, ETC, 143 
Discovery of a Middle Cambrian Breccia largely composed of the 
débris of the above-mentioned Lower Cambrian sandstone, but having 
a matrix affording a Paradowxides fauna, apparently new to the district. 
Investigation of the Igneous and Associated Rocks of the Glensaul 
and Lough Nafooey Areas, Cos. Mayo and Galway.—Report 
of the Committee, consisting of Professor W. W. Warrs 
(Chairman), Professor 8. H. Ruynoups (Secretary), Mr. R. G. 
CARRUTHERS, and Mr. C. I. GARDINER. 
Tue district to the South of Lough Nafooey was visited during August 
1912. In general the geological structure is the same as that of the 
Kilbride district to the East. There seems little doubt that the centre 
of eruption in Arenig times lay nearer to Kilbride than to Nafooey, for 
the Arenig lavas (spilites), which show excellent pillow structure, are 
far less intermingled with breccia near Lough Nafooey than they are 
at Kilbride. The lowest beds seen are ashes, breccias, and a con- 
glomerate containing beds of black chert and shale. Limestone breccia 
has been found at two places amongst the ashes. fossils from these 
beds are very scarce. 
Succeeding these deposits comes a thick mass of spilite, containing 
in places felsite and spilite breccia. 
All these Arenig rocks ave pierced by felsite intrusions, bub noue 
of then: are of any great extent. 
Ou the North a pebbly quartzose grit and conglomerate (probably 
of Llandeilo age) rests on these Arenig rocks, while ou the South they 
are overlain by Llandovery beds continuous with those of the Kilbride 
district to the East. These show the same succession of deposits as 
at Kilbride, and are covered, as they are there, with grits, which are 
of Wenlock age. 
Just as at Kilbride, lime-bostonite and coarse porphyrite are in- 
truded at the base of the Silurians. Dolerites, sometimes micaceous, 
are intruded into the Silurians and Arenigs, while felsite is intruded 
at the base of the (?) Llandeilo grits and into them as well. 
Index Generum et Specierum Animalium.—Final Report of the 
Committee consisting of Dr. HENRY Woopwarp (Chairman), 
Dr. F. A. BatHer (Secretary), Dr. W. T. Catman, Dr. W. 
Evans Hoye, the Hon. Watter Roruscuitp, Dr. P. L. 
ScLaTer, the Rev. T. R. R. Sressine, and Lord Watsinc- 
HAM. 
Durina the year 1911-12 work on this ‘Index’ has proceeded 
steadily, and a large number of volumes has passed through the hands 
of Mr. C. Davies Sherborn. 
Huebner’s entomological works have been thoroughly examined, 
