158 PALEONTOLOGY OF ILLINOIS. 



A few Crinoids have been discovered in irregular deposits both 

 above and below this bed, and they are for the most part of 

 distinct species. 



Next in order are some thin beds of impure limestone, inter- 

 spersed with bands of chert, and a thin bed of oolite half way 

 up. They contain fish remains, including some large teeth and 

 fragments of spines of enormous size, and from this portion of 

 the quarry we obtained a Crinoid apparently belonging to the 

 Lower Burlington fauna. 



The rocks at Le Grand have long been understood to belong 

 to the Kinderhook epoch, and among other characteristic fossils 

 a few Crinoids had been collected; but it was not until re- 

 cently that the rich crinoidal bed to which we have alluded was 

 discovered. 



Within the last two years fine collections have been made by 

 Hon. Delos Arnold, Dr. N. S. McBride, Dr. N. B. Waters, of 

 Marshalltown, and by one of the authors. The quarries are 

 worked by a company, of which Mr. G. F. Kirby is President, 

 Mr. H. J. Howe, Secretary and Treasurer, and Mr. Gregg, Super- 

 intendent. The above named gentlemen have formed a scientific 

 association, which has exclusive control of the collection and 

 disposition of the specimens. It is to their courtesy that one 

 of us is indebted for the opportunity to examine the fossiliferous 

 deposits in situ, to study the specimens, and to make some 

 interesting collections for himself. He avails himself of this op- 

 portunity to tender to Messrs. Arnold, McBride and Waters his 

 grateful acknowledgments for the invitation to make the excur- 

 sion with them, to Mr. Kirby for unusual facilities most 

 generously placed at our disposal, and to all these gentlemen 

 for their many acts of personal kindness and hospitality. 



The geology of this locality has been very clearly described 

 by Dr. C. A. White, in his Report on the Geology of Iowa, 1870, 

 Vol. I, pp. 196-7, where he points out the relation between the 

 rocks in the neighborhood of Le Grand and Indiantown, and 

 the Kinderhook beds at Burlington. He concludes that the 

 heavy oolitic bed represents No. 6, and the superincumbent 

 strata No. 7, of his Burlington section. We see no reason 

 to differ with the distinguished author in this reference, further 



