340 The American Oeoloyist. Juue, i89o 
"Tliis is the name i>'iveu to the Cincinnati group of shales and lime- 
stones, as they appear in Iowa, by Dr. C. A. White, [mis-printed C. M], 
of the Iowa survey of 1870. Without questioning^ the correctness of his 
conclusions that where these shales ajipear in Iowa they ombrace'a 
distinct portion, only, of that series known as the Cincinnati group, his 
designation is provisionally adopted in our nomenclature. While it is 
certain that this formation enters the state from Iowa, being seen two 
miles south of the state line, at Lime Springs, it is still true, that not a 
single observation has yet been made on it within the limits of Minne- 
sota." 
In 1880 Mr. J. F. Whiteaves published'" a notice of some 
fossils that had been found at Stony mountain Manitoba. 
This "mountain" is a hill some fifty feet in hight, on the west- 
ern bank of the Red river not far from Fort Garry, (p. 49). 
Mr. Whiteaves says : 
"The collection made by Mr. Ells at this locality shows, first, that a 
large portion of the mass of Stony Mountain consists of limestones with 
clayey partings, which are identical, both in their lithological and pal- 
ajontological characters, with the well known rocks of the Hudson 
River or Cincinnati group of southern Ohio, and elsewhere ; and sec- 
ondly, that these Hudson River rocks of Stony Mountain overlie, im- 
mediately and conformably, the buff-colored, fossiliferous and more 
or less magnesian limestones of the Red River valley, which have 
already been assumed to be the representatives of the upper part of 
the Trenton limestone." (p. 50). 
The species recorded by Mr. Whiteaves are as follows : 
Cheetetes delicatulus Nicholson. Orthis testudinaria Dalman. 
Monticulipora sp. Orthis sub-quadrata Hall. 
Monticulipora whiteavesi. ? Rhynchonella capax Conrad. 
Nicholson. Murchisonia gracilis ? Hall. 
Favosites prolificus Billings. Cyrtolites ornatus ? Conrad. 
Streptelasnia corniculum Hall. Ascoceras newberryi Billings. 
Ptilodictya (Stictopora) acuta Hall. Cheirurus icarus Billings. 
Slrophomena nitens Billings. Calymene blumenbachi Bgt. 
Strophomena hecuba, Billings. [Identified by Billings but it is 
probably 0. callicephala Green]. ^^ 
In 1883 Mr. W. H. Pratt published'*' an account of "An arte- 
sian well at Moline, Illinois," a point which is al)out fifty miles 
south of Savannah, and a few miles north of Rock Island, Ill- 
inois. In this section the Devonian is given at 113 feet; the 
Niagara at 275 feet ; and the Maquoketa at 220 feet, immedi- 
i*Geol. Survey of Canada, Rept. Progress for 1878-79. Montreal, 1880 ; 
Appendix I ; pp. 49, 50. C. 
'*rhis paper is alluded to in this connection because Dr. George M. 
Dawson later on referred to the strata of Stony mountain as proba])ly 
eqniv^alent to a portion of the rocks of a deep well which he called Ma- 
quoketa shales. See reference below. 
^''Davenport Acad. Sci., Proc, vol. 3, pp. 181, 182. 
