270 Notices of Memoirs — Geology. 



fossils) ; but from the probable Triassio age of certain overlying 

 beds, they may be partly Permian and partly Carboniferous. 



W. W. 



7. — Maxwell, L. G-eological Section (Eeport of). Bep. Bughy School 



Nat. Hist. Soc.for 1873, pp. 64, 65 (Plate). 



Three sections of "the Oolitic Drift at Brownsover" are given. 



The beds are gravel and sand, arranged in a sort of basin. Four 



other sections in gravel, sand, and clay (Bilton), are noticed. W. W. 



8. — Anderson, J. On the Geological Formations of the County 



Down.' Froc. Belfast Nat. Hist, and Phil. Soc. for the Session 



1871-72, pp. 41-49. [1873.] 



The author gives a general sketch of the geology of County Down. 



He points out that the Keuper and Bunter divisions of the Trias 



appear conformable. He disputes the identification of certain 



Permian rocks at Fortwilliam and Cultra, considering them to be 



of Carboniferous age. The Carboniferous and Silurian rocks are 



referred to, as likewise the igneous dykes, and some rocks supposed 



to be of Cambrian age. The mineral veins are briefly alluded to, 



and lastly the author points out some of the later changes in the 



physical geography of the district. H. B. W. 



9. — Macpherson, J. Geological Sketch of the Province of Cadiz. 

 8vo. pp. 59. Cadiz, 1873. 



The author first describes the physical geography of the district, 

 and then points out the general features of the Secondary rocks. 

 These form three distinct series, perfectly well defined by their 

 respective faunas. The lower one is formed by strata which belong 

 to the Liassic formation ; in the second organic remains are found, 

 which prove it to belong to the Upper Jurassic series ; whilst in the 

 third, beginning with the fauna of Stramberg, the strata terminate 

 with true Neocomian deposits. Eocene, Miocene, Pliocene, and 

 recent deposits are briefly described. Gypsiferous rocks form a broad 

 belt, which traverses the entire province ; the author hints at their 

 possible Triassic age, but " is more inclined to consider these deposits 

 as the result of a profound epigenesis which has taken place since 

 the Miocene epoch." Salt and sulphur springs are numerous in the 

 region, and there are some mud-volcanos in activity. 



The work is accompanied by several plates of sections, which the 

 author describes, pointing out the nature of the disturbances which 

 have taken place ; and indeed the structure of the country as dis- 

 played in these sections is one of numerous undulations. 



A geological and an isometrical map accompany the paper, and 

 it is interesting to compare the two : there is hardly any connexion 

 between the geological boundaries and the contour-lines, owing to 

 the great disturbances that have taken place, and the vast denu- 

 dations that have succeeded them. H. B. W. 



10. — Young, E. Some Eemarks on the Eecent Changes of Coast 

 Level at Ballyholme Bay, Co. Down. Froc. Belfast Nat. Hist. 

 and Phil. Soc.for the Session 1871-72, pp. 39-40. [1873.] 

 A section of the Post-Tertiary beds exhibited at Ballyholme Bay 



is described. These comprise, first, Boulder-clay, which rests 



