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POPULAR SCIENCE REVIEW. 
encouragement of geology or of any of tlie allied sciences by which they 
shall consider geology to have been most materially advanced, either for 
travelling expenses or for a memoir or paper published or in progress, and 
without reference to the sex or nationality of the author or the language in 
which any such memoir or paper may be written. And I declare that the 
council of the said society shall be the sole judges of the merits of the me- 
moirs or papers for which they may vote the medal and fund from time to 
time. And I direct that the legacy hereinbefore given to the said society 
shall be paid out of such part of my personal estate as may be legally appli- 
cable to the payment of such bequests.” 
A Labyrinthodont from the Coal-measures. — Mr. J. M. Wilson read a 
paper on this subject before the Geological Society, April 14, 1875. The 
fossil referred to in this paper was from the Leinster Coal-measures, and was 
regarded as probably belonging to the genus Keraterpeton of Professor 
Huxley, although the outer posterior angles of the skull do not appear to 
have been prolonged into cornua. 
Probable English Coal-fields. — Mr. C. Ketley, writing on this subject in the 
u Geological Magazine ” for May, describes at some length the recent efforts 
which have been made at Sandwell. He says that, stimulated by the Sand- 
well success, other companies are forming to search for coal under the red 
rocks of large estates situate still further away from the u eastern boundary” 
of the old coal-field than Sandwell. Is it not probable that still higher 
coal-measures may be recognised ? Is it not possible that the Spirorbis 
Limestone may yet be found over all, to prove the relation between the 
South Staffordshire and the Warwickshire coal-fields on the one hand, and 
the Wvre Forest coal-field on the other ? 
A New Geological Map of London. — We quite agree with the opinion ex- 
pressed by our contemporary the “ Geological Magazine ” (May, 1875) that 
the publication by the Geological Survey of a Map with London as a centre 
will be hailed with satisfaction by those interested in the geology of the 
metropolis, and of the country within easy distance around it. Formerly 
one had to procure four distinct sheets of the Geological Survey Map of 
England, in order to obtain the whole of London geologically coloured, and 
then one obtained actually more than was necessary for the illustration of 
London geology or convenient as a diagram for the wall of the library. The 
present map embraces an area bordered on the North by Blackmore, Epping, 
Waltham Abbey, Potter’s Bar, Watford, and Chesham Bois j on the West 
by Amersham, Windsor, Chertsey, and Cobham ; on the South by Epsom, 
Croydon, Farnborough, and Shoreham; and on the East by Gravesend, 
Grays Thurrock, Brentwood, and Frierning. The map is published both 
with and without drifts ; but it need hardly be said that for most practical 
and scientific purposes the map showing drifts is alone desirable, for no 
geological map on a scale of one inch to a mile can be considered complete 
if the superficial deposits be omitted. Their influence on the scenery of the 
district is trifling, for the main features were sketched out before the drift 
deposits were laid down : they rest indifferently upon the Tertiary strata and 
chalk, and yet many of them, and particularly the glacial deposits, have 
suffered much denudation. 
The Origin of the Chesil Lank. — Professor Prestwich, F.B.S., has written 
