Notices of Memoirs — British Association. 463 



the nature of the original material and of the alteration being some- 

 what like what we have in Wasdale Beck ; and in these altered 

 fragments several crystals of anatase occur, similar in all respects 

 to those described. They are not clustered together, but scattered 

 about ; — the alteration of the rocks has not proceeded so far as the 

 development of any spots. 



nsroTiOES oif livdiEjynone-s. 



I. — Bkitish Association for the Advancement or Science. 

 Cardiff Meeting, August 20th to 2oth, 1891. 



List of Titles of Papers Read in Section C, Geology. 



Professor T. Eupert Jones, F.R.S., F.G.S., President. 



The President's Address. 



Sir A. Geikie. — Discovery of the Olenellus-zone in the North-west 

 Highlands. 



Sir A. Geikie. — On some Eecent Work of the Geological Survey on 

 the Archsean Gneiss of the North-west Highlands. 



A. Smith Woodioard. — Report of the Committee on the Registration 

 of Type Specimens. 



A. Smith Woodward. — Remarks on the Lower Tertiary Fish Fauna 

 of Sardinia (see infra, p. 465). 



A. Smith Woodward. — Evidence of the Occurrence of Pterosaurian 

 and Plesiosaurian Reptiles in the Cretaceous of Brazil. 



A. J. Jukes-Browne. — The Cause of Monoclinal Flexure. 



A. J. Jukes- Browne. — Note on an undescribed area of Lower Green- 

 sand or Vectian in Dorset (see supra, p. 456). 



A. G. G. Cameron. — On the Continuity of the Kellaways Beds over 

 extended areas near Bedford, and on the extension of the Fuller's 

 Earth Works at Woburn, Bedfordshire. 



Prof. W. Boyd Dawkins. — On the Discovery of the South-Eastern 

 Coalfield. 



W. TopJey. — The Geology of Petroleum and Natural Gas. 



0. G. Dalhousie Ross. — The Origin of Petroleum. 



Dr. H. Hicks. — A Comparison between the Rocks of South Pembroke- 

 shire and those of North Devon. 



W. A. E. Ussher. — Vulcanicity in the Lower Devonian Rocks. The 

 Prawle Problem. 



A. B. Hunt. — On the Occurrence of Detrital Tourmaline in a Quartz- 

 Schist west of Start Point, South Devon (see infra, p. 465). 



C. E. De Bance. — Report of the Comniittee on the Circulation of 

 Underground Waters. 



G. E. De Bance. — Notes on the Discovery of Estheria minuta (var. 

 Brodieana) in the New Red Sandstone. 



0. W. Jeffs. — Report of the Committee on Geological Photographs. 



Montagu Browne. — On Golohodus, a Genus of Mesozoic Fossil Fishes. 



C. Davison. — Report of the Committee on Earth Tremors. 



