RECOKD OF PROCEEDINGS. 269 



ness of from ten to twenty feet ; more than twenty species of fossils are 

 represented. These forms are very marked, some of them in strong 

 contrast with anything above or below. The representatives of seven 

 great classes— Echuiodermata, Brachiopoda, Gasteropoda, Gephalapoda, 

 Crustacea and P^,sces— ask for a place— their own place— in the Helder- 

 berg. They enter a standing protest against any attempt to deprive 

 them of their rights. From the very first they abominated the influx of 

 this Hamilton mud into the clear waters of their quiet homes. 

 This paper claims: — 



1. The discovery of beds on the Iowa side of the river that have not 

 before been described. 



2. It determines their true relation to the disputed rock between Mo- 

 line and Rock Island. 



3. The two taken together form a series comprised between well- 

 defined limits— the Hamilton above, the so-called ^'flint rock" below. 



4. They contain a series of fossils, entirely differing from any in the 

 Hamilton Group. 



5. Their general affinities seem to be with the fossils of the Cornife- 

 rous, or Upper Helderberg. 



6. Of this rock, we conclude they form the upper and fossiliferous 

 member. 



7. If common opinion as to the thickness of the group is correct, it 

 must attain to nearly one hundred feet, of which the upper twenty feet 

 contain the fossils enumerated in this paper.* 



September 13th, 1878. — Historical Section. 

 J. A. Crandall in the Chair. 

 Twelve members present. 



A number of donations to the Library were reported. The 

 evening was spent in an informal talk on historical matters. 



At a meeting of tlie Trustees, held September 13th, 1878, the following 

 resolutions, presented by W. H. Pratt, were unanimously adopted : 



Besolved, That Dr. C. C. Parry be invited to deposit his botanical col- 

 lecticms and conduct his investigations in the building of the Academy, 

 and that the "• Botanical Room," or such other room as may for the time 

 being be more convenient, be placed at the disposal of Dr. Parry for the 

 above purpose. 



Besolved, That Dr. Parry be invited to take charge of the Botanical 

 Collections of the Academy. 



*See Geological Report of the State of Illinois, Vol. V, p -i-i-i. 



[Proc. D. A. N. S. Vol. II.] 36 [Oct. 1878.1 



