J. W. Dawson on Paleozoic Rhizocarps. 19 



11. Prof. Macoun : — Notes on Canadian Polypetalae. 



12. Principal Dawson : — On Spores and Spore-cases from the 

 Erian Formation, 



13. Dr. R. Bell : — On the Causes of Fertility of the Land in 

 the Canadian North- West 



14. Prof, Chapman : — A new classification of Crinoids. 



15. (L) Dr. T, Sterry Hunt; — Studies of Serpentine Rocks; 



16. (II,) The Taconic Question in Geology. 



17. Rev. Dr. Honeyman:- — On the Triassic and later Geological 

 formations of the Eastern United States and British America. 



18. Prof. L. W. Bailey :-— On the occurrence of Indian remains 

 in New Brunswick 



19. J, F. Whiteaves:— - Some recent additions to the fauna of 

 the Hamilton group in Ontario, 



}&**^*~ 



IIL Ox Rhizocarps in the Paleozoic Period 



By J. W. Dawson of Montreal. 



(React before the American Association at Minneapolis, Aug, 16, 



1883,) 



Some years ago my attention was directed by the late Sir'W. 

 E. Logan to a shale from the Erian formation of Kettle Point, / 

 Lake Huron, supposed to be on the horizon of the Marcelius 

 shale of New York, and which was filled with minute brownish 

 discs, scarcely more than an hundredth of an inch in diameter, 

 and which I recognized as probably spore-cases of macrospores 

 of some acrogenous plant. They were described in some detail 

 in a paper on il Spore-cases in Coal," published in the American 

 Journal of Science, for April, 1871, and reprinted in the Cana- 

 dian Naturalist, new series, Vol. V. 



They were described as " flattened disc-like bodies, slightly 

 papillate externally, and with a minute point of attachment at 

 one side and sometimes a slit more or less gaping at the other. 

 Viewed under the microscope as .transparent objects, they appear 

 yellow like amber, and ^how little structure, except that the walls 

 can be distinguished from the internal cavity, and the latter is 

 seen in places to contain patches of granular or flocculent matter." 



