240 NATURAL SCIENCE. March. 1894. 



character of its vegetation and animal life determined by them — though it was set 

 itself in a frozen sea. Such an extreme case is, I think, a possibility. 



In India where we have flows of trap or lava, altogether covering an area of 

 200,000 square miles, we learn to look at such questions from a somewhat liberal 

 scale of measurement. 



II. — Chemical deposits are by no means invariably formed by hot springs. And 

 even in those cases where they are formed they are not always of so stable a character 

 as to leave permanent traces. 



Still it may be the case that beds of limestone occurring in association v/ith such 

 fossils as I have referred to may really have been derived from the calcareous 

 deposits (travertine) of hot springs. 



III. — It is scarcely needful to add that fossil localities often occupy very narrow 

 and restricted areas. 



Science and Art Museum, Dublin, V. Ball. 



February 12, 1894. 



The Geological Society's Journal. 

 In the " News of Universities," Nat. Sci., vol. iii., p. 470, reference is made- 

 to the printing of the date of issue of scientific publications side by side with 

 the signatures. Allow me to point out that the editor of the Quarterly Journal 

 of the Geological Society has this year initiated an improvement even on this, the 

 date of issue being printed at the top of every open two pages, half on each side 

 of the fold. C. D. S. 



Cephalaspis in the Caithness Flags. 

 In reference to the recent announcement of the discovery of the " typically- 

 Lower Devonian genus Cephalaspis" near Thurso (Nat. Sci., vol, iii., p. 255), 

 it should be remembered that this fish occurs in the Upper Devonian of Scau- 

 menac Bay, Canada (see Geol. Mag., i8go, p. 15). We must not, therefore, be 

 surprised to find it in the allied fauna of " Lake Orcady." 

 Junagadh, Kathiawad, India. J. W. Evans. 



TO CORRESPONDENTS. 



Rev. S. Barber. — We are obliged for your communication. Meteorology does not 

 especially concern us ; but you will find a mention of the storm of July 8, 1893, 

 oil P- 395 of our third volume. 



Recorder. — The investments of the Geological Society of London for the past four 

 years are: — ;^42o (1890); /506 (1891) ; £^2^ (1892); ;^502 (1893). The total 

 value of the invested funds is, according to the latest balance-sheet of the 

 Society, £io,']2g iis. 



All communications for the Editor to he addressed to the Editorial 

 Offices, 5 John Street, Bedford Row, London, W.C. 



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 AND Co., 29 Bedford Street, Strand, London, W.C. 



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