308 '^enyns — Phospliatic Nodules. 



Jenyns stated, on the authority of Mr. Charles Moore, F.G.S., that 

 phosphatic nodules are found in the Upper Grreensand, which is very 

 continuous at the base of the Chalk escarpment throughout the 

 coTuities of Wilts, Dorset, Somerset, and Devon, it is, however, 

 seldom opened, and when opened the phosphatic nodules, though 

 present, are not so abundant as at Cambridge, and together with the 

 fact that they are more silicious and consequently contain less phos- 

 phatic matter, Mr. Moore thought it doubtful whether the beds in 

 the south-west of England would ever repay the cost of working. 



n. — EozoSn in Bohemia and in Bavaria. 



By Messrs Hochstettek and Gumbel, 



[Uebee, das Voekommen von Eozoon im krtstallinischen Kalke von 

 Krummau in siiDLiCHEN BoHMEN. Von Prof. Dr. Ferdinand von Hoch- 

 stetter. 870. 1866. Ueber das Vorkommen von Eozoon im ostbayerischen 

 Urgebirge ; mit 3 Tafelen. Von C. Gumbel. Svo. 1866.] 



I. 



AFTER noticing the discovery of Eozoon in Canada and Ireland, 

 and its geological importance, Dr. Hochstetter, in his paper 

 (read before the Vienna Academy of Sciences), briefly explains the 

 relations of the gneiss of Southern Bohemia. Tliis consists of two 

 great series of gneissose and granitic rocks, great infoldings of which 

 form the mountain-range of the Bohmerwald. The lower (1) is 

 Gumbel's " G-ojic G-neiss," and the upper series (2) is his " Her- 

 cynian G-neiss ; " this latter contains (like the Laurentian Gneiss of 

 Canada) beds of graphite and of serpentinous marble. Pebbles of 

 quartz in it, and its bituminous odour when struck with a hammer, 

 had already satisfied Dr. Hochstetter of the sedimentary character of 

 the marble ; and he sent some of the green variety (from Krummau) 

 to Dr. Carpenter, who determined the presence of Eozoon in it. 



The upper gneiss is succeeded unconformably by (3) mica-schist, 

 here referred to the Upper Laurentian ; this by (4 j clay-slates ; and 

 (5) the " Przibram schists" (with Annelid-marks, — i^n'fec/*), which 

 are tabulated together as equal to the Lower Cambrian or Longmynd 

 rocks of Britain, and the Huronian of Canada. In the diagram, 

 however. No. 4 is comformable to No. 3 ; but there is a violent 

 unconformity between No. 4 and No. 5. The Przibram grauwacke 

 follows next, and, with the " Ginetz beds,' (or "Primordial beds" 

 of Barrande), is grouped as the Upper Cambrian of Britain, and the 

 Taconic beds, or Potsdam sandstone, of North America. 



II. Herr Giimbel commences his more elaborate memoir (read 

 before the Munich Academy of Sciences) with well-considered re- 

 marks on the importance of the discovery of anything like organic 

 remains in metamorphic rocks, especially in those of oldest date ; — 

 such discoveries, he says truly, give a new dawn-light to geologists 

 searching out the earth's primaeval history. He then proceeds to 

 sketch the chief geological characters of the so-called "primitive 

 rocks" of Eastern Bavaria, and to compare them with Logan's 



