SCIENTIFIC SUMMARY. 
93 
of Derbyshire ; and the set of sandstones and flagstones No. 2 as the repre- 
sentative of the millstone grit of that county. It would, however, be im- 
possible in the south of Ireland to draw any recognisable boundary subdividing 
the coal-measure series, and the attempt would, therefore, only tend to con- 
fusion.” The author next pointed out that palaeontologically the coal- 
measures of Kilkenny, Queen’s Coimty, Limerick, Clare, Kerry, &c., were 
similar to those of Coalbrookdale, Staffordshire, and other places in Eng- 
land. 
The Geology of Clermont , Auvergne . — Mr. It. G. Symes, F.G.S. (Royal 
Geological Society of Ireland), has published an account of his enquiries in 
this district during the summer of 1870, when he visited the district in com- 
pany with Mr. Leonard. The paper describes the result of their observations 
on the plutonic, aqueous, and volcanic rocks. The country chiefly exa- 
mined was that between four and five miles west of Clermont. The granite 
is described as generally consisting of two micas (margarodite and lepido- 
melane, the latter predominating in nearly every case over the former), one 
felspar (oligoclase), and the other glassy quartz. It was found to decompose the 
more readily as it approached volcanic rocks. The aqueous rocks, of Upper 
Eocene or Miocene age, are briefly described as consisting of grits, marls, 
and indusial limestone or travertin. The grits are for the most part com- 
posed of the debris of granite and basalt, bound together by a siliceous 
cement. Mr. Symes obtained a specimen containing a well-rounded pebble 
of basalt : a fact of some importance, as Scrope and Lyell remark that no traces 
of volcanic rocks occur in these beds. In regard to the volcanic phenomena, 
the inferences drawn are: that the condition to which the volcanos are 
referable is that in which eruptive paroxysms of intense energy alternate 
with lengthened periods of complete inertness \ that the cinder cones, 
domitic hills, and recent lavas, are all due to one violent paroxysm spread, 
over an area twenty miles long by two broad j that the presence of two such 
different rocks as basalt and trachyte, in close juxtaposition, can only be 
accounted for on the supposition that the rocks from which they are derived, 
namely hornblende rock and some highly felspathic rock (such as granite), 
were in contact prior to their being reduced to the forms we now find them 
in ; that the granite plateau was very much in the same condition prior to 
the deposition of the lacustrine strata, as it is now ; that prior to the deposi- 
tion of the lacustrine strata this district was probably the seat of volcanic 
eruption. 
Life of Professor J. Beete Jukes , M.A., F.B.S. — The life of this eminent 
geologist has been prepared by the loving hands of his sister. It possesses an 
excellent portrait, and extends over about six hundred pages. It is full of 
matter interesting to geologists and to those who were acquainted with 
Professor Jukes, but of course we cannot abstract it here. It is published 
by Chapman & Hall. 
A new Fish , Phaneropleuron elegans, has been discovered by Professor 
Traquair, of Dublin, and is described by him in the u Geological Magazine ” 
for December. It seems to be a fish very closely resembling the Phanero- 
pleuron Andersoni of Huxley, but differing from it in its smaller size, in its 
somewhat more slender form posteriorly, in the smaller depth of the lower 
lobe of the caudal fin, and apparently also in the greater extension forwards 
