INTRODUCTION. XXV11 



them there is a " strange absence of any allusions to obvious 

 objections," and a " persistent begging of the question involved 

 in constantly speaking of the specimens as undoubted fossils." 



Eozoon Canadense. Dr. W. B. Carpenter. Nature, vol. iii. 1871. 



pp. 185, 186. 

 A letter in answer to Mr. T. Mellard Reade. 



Eozoon Canadense. Dr. J. W. Dawson. Nature, vol. iii. p. 267. 1871. 

 A short note. 



G. H. Kinahan. Nature, vol. iii. p. 267. 1871. 



The writer draws attention to the fact of its having been 

 announced that Mr. Sandford had "proved the existence of 

 Eozoon 33 in the ophites of Connemara, which, according to 

 Sir E. I. Murchison and Prof. Harkness, are of Lower Silurian 

 (Cambro-Silurian) age. " In other parts will be found square 

 miles upon square miles of rocks of the same geological age, 

 often having inliers of limestone ; yet in them there is no Eozoon 

 Canadense, it only being found in a peculiar rock (pseudomorph 

 dolomyte) in this small tract of Lower Silurian rocks, in Yar- 

 Connaught." 



Dr. J. W. Dawson. Nature, Feb. 9, 1871, vol. iii. p. 287. 1871. 



A letter, replying to T. Mellard Readers criticisms. 



T. Mellard Reade. Nature, March 9, 1871, vol. iii. pp. 367, 368. 1871. 



Dr. W. B. Carpenter. Nature, vol. iii. p. 386. 1871. 



A letter, more personal than argumentative, which, of course, 

 closed the discussion. The author announced that "Messrs. David 

 Forbes and H. Sorby altogether disown Eozoon as a mineral." 



4 



On Eozoon. L. S. Burbank. Proc. Boston Soc. Nat. Hist. 1871. 



The writer's main object is to show that " Eozoon " is found 

 in ophi-dolomites, which occur filling cavities along the line of 

 an anticlinal axis, and are therefore not true stratified deposits 

 laid down with the gneiss associated with them. 

 Prof. John Phillips. Geology of Oxford and the Valley of the 1871. 

 Thames. 



" Only in another part of the world among strata of gneiss as 



