270 Notices of Memoirs. 



and has converted the limestones into dolomites. Such effects, he 

 explained, could elsewhere be traced with certainty to ferruginous 

 and magnesian infiltrations, which had soaked down from the New 

 Eed rocks into the strata upon which they might happen to lie. He 

 was therefore disposed to refer the hsematite in question to deposition 

 from such a source, and to regard the summit of Arthur's Seat as 

 the modified descendant of the surface over which, in past times, the 

 New Eed rocks had extended. 



X. — Ancient VoLCANOS IN Arran. — On the Upland between Brodick 

 and Drumadoor Bays, in the island of Arran, Messrs. B. N. Peach 

 and W. Grinn, of the Geological Survey, have discovered the site and 

 ruins of a very large volcano, covering an area of seven or eight 

 square miles. It is represented by an accumulation of old scorias, 

 broken rocks, and intrusive lavas, such as are usually found in 

 similar basal wrecks of volcanos, whether of Jurassic, Cretaceous, 

 or Tertiary age, in the Hebrides and Western Scotland. In this case, 

 however, Mr. E. T. Newton has detected Eheetic fossils in some of 

 the fragments embedded on the ruined volcano, and constituting the 

 only record of strata once extending from Mull to Antrim. Thus 

 they supply one proof of the enormous denudation which has taken 

 place on the west coast of Scotland during the later part of the 

 Tertiary era. 



XI. — Geology of India. (Memoirs of the Geological Survey of 

 India, vol. xxx, pt. 2, 1900; vol. xxxiii, pt. 1, 1901.) — The first 

 of these memoirs contains Thomas H. Holland's Geology of the 

 neighbourhood of Salem, Madras Presidency, with special reference 

 to Leschenault de la Tour's observations. Leschenault collected 

 petrological specimens from the district early in the last century 

 (1816-1821), and it seemed desirable to obtain information con- 

 cerning the geological relations and exact localities of his specimens. 

 Lacroix described the rocks, which are preserved in Paris. They 

 may be divided into (1) fundamental biotite-gneisses, (2) schists, 

 (3) pyroxene-granulites (charnockites), (4) younger igneous in- 

 trusions. The exact localities have been traced and the specimens 

 identified. A map accompanies the paper. The second memoir 

 is by F. H. Hatch, and deals with the Kolar Goldfield, with 

 a description of quartz mining and gold recovery as practised in 

 India. The field bears a striking resemblance to the gold districts 

 of Ehodesia. It consists of a belt of schists containing quartz- veins, 

 and is part of the Transition Eocks, separated by Bruce-Foote and 

 given the name of ' Dharwar System.' There is an appendix on the 

 petrology by T. H. Holland. 



XII. — Fossil Foraminifera of Servia. (Pavlovic, P. S. "Fora- 

 miniferi iz drugho-mediteranskikh slojeva u Srbiji paleontologhka 

 studija." Spomenika (being the Trans. Acad, Sci. Belgrade), 

 vol. xxxv, 1900, pp. 61-91.) — Professor Pavlovic is already known 

 to us by a previous publication on the above subject, which appeared 

 in Glilasa, vol. Ivi, 1898. This appears to be a report on the 

 II Mediterranean beds, so far as relates to Servia, and will be of 



