INTRODUCTION. Xlll 



" The Eozoon Canadense." A letter, signed " William B. Car- 1865. 

 penter," appeared in a following number of the ' Reader/ 



The writer asserts that the " conformity " between ' ' Conne- 

 mara serpentine " and " that of the least characteristic part of 

 the Canadian fossil " is " so close as to leave no doubt in my 

 mind as to the organic origin of the former." Next, he makes 

 a characteristic personal attack on the writers of the preceding 

 letter, " advisedly " remarking on the "audacity" of the one 

 in presuming to dispute the organic origin of Eozoon, and 

 impliedly charging the other with incompetency. 



A short reply, signed < William King," appeared in the 

 next number of the ' Reader '*. 



The Cambrian Rocks of the British Islands. W. Hellier Baily. 1865. 

 Geological Magazine, vol. ii. p. 388. 



Mr. Bailey expresses his doubt that ' ' Eozoon" " the thing 1865. 

 in question, was a fossil at all" (Journ. Geol. Soc. Dublin, 

 vol. i. N. S.). 



" Eozoon" having been brought under the notice of the Geo- 1865. 

 logical Section of the British Association, held in Birmingham 

 of this year, Professor R. Harkness declared his disbelief in it 

 (' Reader/ Sept. 30, 1865). 



On the so-called "Eozoonal Rock." Professors W. King and 1866. 



T. H. Rowney. Q. J. G. S. vol. xxii. pp. 185-218. 

 In this memoir evidences are adduced to show that the " cal- 

 careous skeleton " and the " chamber casts " of " Eozoon Cana- 

 dense " stand in the same relation to each other as the calcitic 

 matrix and its included mineral silicates in a number of rocks, 

 that the lamellated and the acervuline varieties are strictly paral- 

 leled, the one by a rock in Scandinavia consisting of alternating 

 layers of calcite and a hornblendic mineral, the other by cocco- 

 litic marbles of Tyrol, Delaware, and elsewhere, that the 



* Another letter, dated July 24, 1865, on a subject arising out of our 

 announcement, and introduced by Dr, Carpenter, was published in a suc- 

 ceeding number. 



