470 Dr. W. B. Carpenter on Eozoon canadense. 



the hest-preserved specimens of this body, and that it is the 

 only hypothesis which fits all the facts of the case ; whilst the 

 hypothesis of subsequent metamorphic change, which has every 

 probability to recommend it, fully accounts for all the appear- 

 ances on which the Anti-Eozoonists rely as evidence of its 

 Mineral origin, which, in the face of the new evidence I have 

 now adduced, is to my own mind utterly " unthinkable." I 

 do not attempt, however, by dint of hammering-in, to impose 

 my own (doubtless) prejudiced conclusion upon the minds of 

 others, but have endeavoured to place before them the facts 

 of the case in such a form as may help them to form their 

 own judgment in regard to them. 



Until these facts shall have been disproved by the examina- 

 tion of the specimens which I am ready to submit to any or 

 all of my opponents, I must claim to withdraw from a con- 

 troversy which cannot be carried further to any advantage 

 without a " comparison of actual specimens." For whilst I 

 admit to the full every evidence of Mineralization adduced by 

 Professors King and Rowney, neither they nor Mr. Carter 

 admit the evidence of Organic structure which they have not 

 seen, but which I have expressed my willingness to place 

 before them, with the parallelisms presented by recent Fora- 

 minifera. 



I am endeavouring to engage my Canadian associates in the 

 preparation of a joint Monograph on Eozoon canadense, to be 

 offered to the Palfeontographical Society — with a request that 

 before determining either to accept or to decline it, the Coun- 

 cil will appoint a Committee of '^ experts," qualified by their 

 knowledge of Micro-Paleontology and Micro-Mineralogy to 

 judge whether what we hold to be Organic structure can be 

 possibly regarded as the product of any kind of Physical or 

 Chemical action. 



EXPLANATION OF PLATE XIX. 



Fig. 1. Vertical Section of a portion of one of the calcareous lamellae of 

 JHozoon canadense, showing the tubular " nummuline layer " a a, 

 the " intermediate skeleton " ce, and the relations of the origins 

 of the canals, b b, to the tubuli of the nummuline layer, tlie 

 flexures of which are seen along the line a' a' : 100 diameters. 



Fit/, 2. Vertical Section of a portion of the " nummuline layer " a a, 

 under a higher magnifying-power, showing its distinct tubula- 

 tion, with shai'p flexures along the li)ie a' a' : 250 diameters. 



Fit/s. 3, 4. Internal Casts of Canal-system, showing what appears to be 

 its typical mode of disti-ibution : 35 and 15 diameters. 



Fir/. 5. Transparent Section of a portion of the Canal-system, showing an 

 only partial filling of the canals : 100 diameters. 



