jV. H. Winchell on the "Original Huronian.'"' ii 
communicate their organization to the present (Paris) Congress 
and to the committee of organization of the next (Bologna). 
Their reports were to be sent before the ist of Jan., iS8i, to 
the committee of organization of the Bologna Congress which 
should be responsible for having them printed before the open- 
ing of that Congress. 
Committees were appointed to study the questions of rules to 
be followed in establishing the nomenclature of species. These 
committees were to consist, for paleontology, of Cotteau, Don- 
villg, Gaudry, Gosselet, Pomel, de vSaporta, and for mineralogy 
of Des Cloizeaux, and Janettaz. After the usual amount of the 
commodity designated by the English A. A. S. "butter," the 
Congress adjouned. 
(To he concluded.) 
THE ANIMIKE BLACK SLATES AND QUARTZYTES, AND 
THE OGISHKE CONGLOMERATE OF MINNESOTA, THE 
EQUIVALENT OF THE "ORIGINAL HURONIAN." 
BY N. H. WINCHELL. 
The existence or not of a stratigraphic rock-horizon which 
could be denominated Huronian has been debated by geologists. 
The true character of the rocks of which the Huronian is com- 
posed has been misunderstood. They have been described as 
"greenstones," in general terms, and no designation could be 
fm-ther from the truth. So long as this idea of the composition 
of the Huronian prevails, doubt and disagreement will con- 
tinue. The confusion that has arisen respecting the Huronian 
is due, to a large extent, to the contradictory and variant descri])- 
tions published by the authors of that name, that is, the geolo- 
gists of the Canadian geological survey. Mr. Murray referred 
to the rocks on the north shore of lake Huron in some of the 
earlier reports of that surve}^, and so far as I have observed he 
had definite and correct ideas of their nature. The name, and 
the first announcement of it, were accredited to Messrs Logan 
and Hunt jointly. Mr. Hunt, who has written largely of the 
Huronian, took his conception of its nature fi'om samples which 
had been gathered bv others, never having visited the locality 
