1868.] MEETING OF THE AMERICAN ASSOCIATION. 295 



importance as a character, in fixing their affinities, and that the 

 Tabulata must be dismembered, — Halisites, Millepora, and their 

 allies, being classed as Hydroids ; and Pocillopora and Favosites 

 with other extinct tabulated genera, as true Polyps. 



On the Coal Measures of Illinois ; by Prof. A. H. 

 Worthen, State Geologist. — In prosecuting the geological 

 survey of Illinois, it seemed desirable to identify the coal seams 

 of that State with those of Kentucky, which occupy the same 

 basin. To effect this, a section was constructed along the valley 

 of the Illinois River, which traverses the coal-field from S.W. to 

 N.E. for about 100 miles. Six beds of workable coal, and four 

 or five thin seams, were met with in the section. After correcting 

 an error, which he thinks had been made in constructing the 

 Kentucky section, by considering the outcrop of the same 

 sandstone at Mahoning and Anvil Rock as different beds, Prof. 

 W. found a very close resemblance between the Illinois and 

 Kentucky strata. From his observations, he infers the existence 

 of coal seams over wide geographical areas. The fact was also 

 stated that many of the fossils of the carboniferous limestone, 

 in this region, are identical with those described by Hayden 

 and Meek, from the so-called sub-carboniferous rocks of Eastern 

 Kansas. 



ON RECENT GEOLOGICAL DISCOVERIES IN THE ACADIAN 



Provinces of British America; by J. W.Dawson, LL.D., 

 F.R.S., Principal of McGill University. The object of the paper 

 was to notice some recent discoveries, which, though of interest 

 might have escaped the notice of members of the Association. 



In New Brunswick, the older rocks in the vicinity of the city of 

 St. John have been reduced to order, and their probable a^es 

 ascertained, principally through the labors of Mr. Matthew, Mr. 

 Hartt, and Professor Bailey. The first step toward the knowledo-e 

 of their precise date was the discovery of a rich land flora in some 

 of the upper beds, next below the Lower Carboniferous rocks 

 which overlie them unconformably. These fossil plants he was 

 enabled to recognize as of the Devonian Period, and the zealous 

 researches, more especially of Mr. Hartt, have brought to light no 

 less than forty to fifty species, or half of the whole number known 

 in the Devonian of Eastern America, as well as six species of 

 insects, four of which have been described by Mr. Scudder.* 



Canadian aSTaturalist. 1867. 



