370 Reports and Proceedings. 



Dr. Duncan commented on the value of such inquiries, and mentioned that in 

 Devonshire families living in the valleys were peculiarly liable to consumption, wbile 

 those living on the hills were free from the disease. 



8. "On the Volcanic Phenomena of Hawaii." By the Eev. C. 

 Gr. Williamson. Communicated by Sir E. I. Murchison, Bart., 

 F.E.S., V.P.G.S. 



In this paper the author gave a detailed account of the general 

 physical features of the island of Hawaii, noticing especially the 

 characters presented by the volcanic mountains of the island and 

 the results of their eruptions. The eruptions and earthquakes of 

 1868 were particularly described by the author from his personal 

 observations. 



9. " Notes on certain of the Intrusive Igneous Eocks of the Lake- 

 district." By Dr. H. A. Nicholson, F.G.S. 



The rocks referred to in this paper were the syenite of the Yale 

 of St. John, the syenitic porphyry between Ennerdale and Butter- 

 mere, and the felstone porphyry of Carrock Fell. The author de- 

 scribed the characters and position of these rocks with regard to 

 the Skiddaw Slates on the one hand, and the green slates and por- 

 phyries on the other, and indicated that the latter series of rocks 

 are unconformably deposited upon the purely sedimentary Skiddaw 

 slates. The Skiddaw Slates were said to be metamorphosed where 

 they come in contact with the intrusive masses, and the latter were 

 regarded by the author as most probably "the roots of the ancient 

 vents from which were derived the alternating ashes and traps 

 which together compose almost the whole of the green-slate series." 



10. " On the Fossil Myriopods of the Coal-formation of Nova 

 Scotia and England." By Samuel H. Scudder, Esq. Communicated 

 by Sir Charles Lyell, Bart., F.E.S., F.G.S. 



In this paper the author discussed and described the species of 

 Chilognathous Myriopods which have been detected in the Coal- 

 measures. Of these he recognised six, viz., Xylobius sigillarioB 

 (Daws.), X. similis, sp. n., X. fractus, sp. n., X. Bawsonii, sp. n., X. 

 Woodioardii (=sigillar{(B, Woodw.), and a species upon which he 

 founded a new genus, Archiulus xylobioides. He regarded these forms 

 as constituting a peculiar family, for which he proposed the name of 

 ArcMulidce. 



11. "On the Geology of the Country surrounding the Gulf of 

 Cambay." By Alexander Eogers, Esq., F.G.S., Bombay Civil 

 Service. 



Tlie author described the surface of the country as consisting 

 chiefly of deep alluvial soils, derived from the denudation of the 

 primary and metamorphic rocks surrounding the district, the former 

 making their appearance in groups of isolated peaks, projecting, as 

 it were, from a sea of alluvium. The author considered that this 

 alluvium could not have been produced by the action of the existing 

 rivers, and suggested that the Indus may formerly have flowed into 

 the sea by the Gulf of Cambay, the land at the same time being much 

 depressed below its present level. He indicated the evidence in 

 favour of this view furnished by various facts in the geology of the 

 district, and referred especially to the mode of occurrence of laterite. 



