74 Remems — Dublin Quarterly/ Journal. 



when these liave all been carefully revised. Mr. Kelly says that a 

 fossiliferous band of Silurian grit and flags, yields at some half-dozen 

 places in Galway, certain groups of fossils, differing in their propor- 

 tions of Corals, Trilobites, Grasteropods, Bivalves, etc., just as a sea- 

 bed diifers in its local shell-banks, coral-reefs, etc. Hence Mr. 

 Kelly seems to get a reason why the vertical succession of Lingula- 

 flags, Llandeilo beds, Bala, and Caradoc, etc., cannot hold good! 

 We do not feel the force of his argument. In truth, this is but one 

 point in the study of Homotaxis of Strata ; and though such a fact 

 as that produced by Mr. Kelly is of use so far as it goes, yet it bears 

 but little on the migration of ancient faunas, their continuance 

 during oscillations of level, and so on. Mr. Kelly does good by 

 reminding us of the present inexactitude of palaeontology, the loose 

 notions afloat as to the distribution of fossil species, and the necessity 

 of close attention to the relative position of the strata themselves ; 

 and he does a friend's part well in standing up for Professor M'Coy's 

 determinations of the Irish Carboniferous Fossils, and in explaining 

 how some seventy of his typical forms were lost in the removal of 

 Sir E. Griffith's collection to and from the Dublin Exhibition of 1853. 



The geology, state, and prospects of the New Zealand Gold-fields 

 in 1862 are described by Dr. W. L. Lindsay ; and the amount of 

 gold exported from Otago, down to the autumn of 1864, is quoted as 

 1,499,512 ounces. 



Mr. J. Wright describes a new Palcechmus (P. quadriserialis) ; and 

 Mr. W. H. Baily defines and illustrates the structure of Palcechinus, 

 from specimens of P. ellipticus and P. elegans. Mr. W. Harte 

 describes and figures an anomalous and probably new Echinoderm 

 from the Yellow Sandstone of Donegal. Dr. J. M. Barry com- 

 municates some interesting notes on the Icebergs of the Southern 

 Hemisphere in No. xx. Mr. G. Waller points out the Silurian 

 Hydraulic Lilnestone of Courtown Harbour, Co. Wexford, as a 

 peculiarly valuable manure for grain, turnips, grass, etc. A new 

 table and formula for determining Altitudes with the Barometer 

 (both aneroid and mercurial) is supplied by Mr. S. M. Yeates. 



Lastly, as regards geological papers, comes Mr. J. B. Jukes' 

 " Comparison between the Eocks of the South-West of Ireland, those 

 of North Devon, and those of Ehenish Prussia in the neighbourhood 

 of Coblentz." Eeferring to the published " Explanations of the Sheets 

 of the Geological Survey Map " for details of proof, Mr. Jukes insists 

 on the contemporaneity of the Carboniferous Limestone with the 

 Carboniferous Slates and their included '•' Coomhola Grits;" or, in 

 other words, that in the Carboniferous period there were deposited 

 sands and clay -beds in one area, whilst Encrinites and Shells formed 

 limestone at another, according to the recognised nature of sea-beds.' 

 The " Lower Limestone-Shale " (overlying the Old Eed Sandstone) 

 is continuous beneath the grits, slaty-shales, and limestone ; and the 

 Lower Coal-measures uniformly overlie them. Carrying out the 

 principle that varying deposits must necessarily occupy different 

 parts of the sea-bed, Mr. Jukes finds the Marwood and Pilton beds 

 ' See also Geo. Mag., vol. ii. p. 275. 



