Reports and Proceedings — Geological Society of London. 477 



2. "The Tertiary Fossils of Somaliland, as represented in the 

 ■British Museum (Natural History)." By Eichard Bullen Newton, 

 Esq., F.G.S. 



Since the publication, in 1900, of Prof. Gregory's paper, founded 

 on specimens in the Natural History Museum, mostly collected and 

 presented by Mrs. Lort Phillips, the National Collection has been 

 enriched by further series of fossils : the Donaldson-Smith Collection 

 and one presented by Major R. G. Edwards Leckie. The new material 

 is, generally speaking, better preserved than that previously dealt 

 with. The large Lucinidas and specimens of Campanile (previously 

 considered as Nerincea) are very typical of Eocene rocks generally, 

 and they agree with the foraminifera in the Somaliland Limestones 

 in supporting the reference of these rocks to this period. The 

 matrices of these limestones correspond with those surrounding the 

 coi'als described by Professor Gregory as belonging to the Uradu and 

 Dobar Limestones. Two limestones seem to be represented in the 

 collections — an upper, massive and cherty, often coloured reddish- 

 brown externally ; and a lower, of less cherty character and lighter 

 colour. The limestones appear to be capable of correlation with 

 those of the south-eastern corner of Arabia, as well as with those of 

 Sind and Cutch ; they can also be traced in connection with the 

 Eocene areas of Egypt and other regions of North Africa, through 

 Europe to the Paris Basin, and so to the Bracklesham Beds of 

 England. The new collections contain some older fossils, but they 

 are not considered in the present paper. 



A review of the literature of the subject is given, and the author 

 then proceeds to the description of species of gasteropods, lamelli- 

 branchs, echinoids, and corals. Six new species are described and 

 named, and sixteen species or varieties described but not named. 

 An account of the foraminiferal structures of the limestones follows, 

 and the paper closes with a list of the known Tertiary fossils from 

 Somaliland. 



3. " The Caernarvon Earthquake of June 19th, 1903, and its 

 Accessory Shocks." By Charles Davison, Sc.D,, F.G.S. 



The Caernarvon earthquake of June 19th, 1903, was the strongest 

 earthquake indigenous to the county for more than five centuries. 

 Its disturbed area contained about 25,000 square miles, and included 

 nearly the whole of Wales, the North- West of England, the Isle of 

 Man, and several of the eastern counties of Ireland. The centre of 

 the innermost isoseismal (intensity 7) was situated beneath the sea, 

 about 4 miles west of Pen-y-groes, and the longer axis of the 

 isoseismal ran from N. 40° E. to S. 40° W. It is concluded, 

 from the seismic evidence, that the earthquake was caused by a slip 

 of about 16 miles in length along a fault running in the above 

 direction, hading north - westward, and passing either through 

 Clynnog or a mile or two either to the north-west or south-east. 

 In the former case the fault-line might be submarine ; and it is 

 pointed out that, if the fault which runs in a south-westerly direction 

 from Aber to Dinlle (on the coast of Caernarvon Bay) were continued 



