XXX INTRODUCTION. 



1873. President's Address. Dr. A. Macalister. Journ. Roy. Geol. 



Soc. Ireland, new ser. vol. iii. p. 101. 



A paragraph devoted to the " Eozoon controversy/' and 

 pronounced from the President's Chair of the Royal Geological 

 Society of Ireland, requires some little notice. Referring to some 

 memoirs (not named), it is stated that they <e occasioned a con- 

 troversy which, if it did nothing else, turned some attention to 

 the study of micro-petrography, and some at least of the writers 

 displayed a very considerable practical ignorance not only of 

 the appearance of sections of large foraminifera, but also of 

 sections of common forms of rock and of the interpretation of 

 rock-forms as seen by the microscope. With a larger expe- 

 rience of micro-petrography will come, I believe, a full convic- 

 tion of the true organic nature of Eozoon Canadense" It is 

 now eight years since these remarks were made ; and undeniably 

 their author had taken considerable pains to master the biblio- 

 graphy of points connected with the subject matter he touched 

 upon : it is therefore to be assumed that Dr. Macalister still 

 takes a deep interest therein, also that he is perfectly aware his 

 " full conviction " has not yet been realized ; hence we would 

 urge on him to endeavour himself to bring about the outcome 

 which he so confidently predicted in his " Address." 



1874. On the Structure called Eozoon Canadense in the Laurentian 

 Limestone of Canada. (A letter to Prof. W. King, Sc.D.j 

 Galway.) H. J. Carter. Ann. & Mag. Nat. Hist. ser. 4, 

 vol. xiii. pp. 189-193. 



The writer pronounces decidedly against the structure of 

 "Eozoon Canadense " being that of a foraminifer. " In vain we 

 seek in the so-called Eozoon Canadense for the unvarying 

 perpendicular tubuli, the sine qud non of foraminiferous 

 structure." 



1874. Remarks on Mr. H. J. Carter's letter to Prof. King on the Struc- 

 ture of the so-called Eozoon Canadense. Dr.W. B. Carpenter, 

 Ann. & Mag. Nat. Hist. ser. 4, vol. xiii. pp. 277-284, 

 After speaking of "the well-merited reputation which Mr 



