Correspondence. 333 
specially referred to has been named the Cascade Anthracite basin and is 
almost continuously bordered by high mountains composed of Devonian 
and Carboniferous limestones (Intermediate and Banff limestones of Mr. 
McConnell's report). In other long Cretaceous basins which occur in 
the mountains for some distance southward, good coking bituminous 
coals ai-e found, but in the Cascade basin only has the alteration been 
carried so far as to produce anthracite. 
A partial analj-sis of the Cascade anthracite, which closely agrees with 
that of Prof. Dodge, will be found m N'otes on coals :ind Uguites of the 
Canadimi NortJrMcst^ Montreal^ 1884. Several additional analyses appear 
in the reports of the Geological Survey for 1SS2-84 and 1885. These are 
by Mr. G. C. Hoffmann who has also determined the evaporative power 
as 7852 calorics or 14.62 lbs. of -^vater at 100° C. evaporated by one pound 
of coal. This evaporative power was determined from a specimen some- 
what inferior in quality to the coal now mined. No ultimate analysis of 
the coal has, so far as I knoAv, yet been made. 
In consequence probably of strains subsequent in date to the complete 
mineralization of the coal, portions of the seams have been found in a 
shattered and slickensided state, but the prospects for profitable mining 
on a large scale appear to be in general very favorable. 
George M. Dawson. 
Nome^idature of some Cincinnati group fossils. Letter from Prof Joseph 
F. yatnes. In the March number of the '■'■American Geologist" the list of 
fossils beginning on page 1S3 contains some errors, probably errors of 
oversight, but Avhich should be corrected. Reference in particular is 
made to numbers 94, 143, 149, 153, 164, 165, 303, though there may be 
others. All of these species are credited to Nicholson, whereas they 
should have been given to Mr. U. P. James. Some of them were, it is 
true, described by Dr. Nicholson, but were by him duly credited to Mr. 
James, who had given them the names under which they are now known. 
It is a little strange that these species should be in this predicament, 
while others named and described under similar conditions are properly 
credited. As examples of these there are numbers 216, 223, 241, 243, 255, 
&c. Mr. Ulrich will, it is presumed, when attention is called to the error 
in his paper, correct it, so that future investigators may not fall into er- 
rors concerning the species that have been mentiened. 
Joseph F.James, M. S. 
Miami University, Oxford, (9., March 17, 1SS8. 
Reply of Mr. Ulrich. The species referred to in tlie above communi- 
cation by numbers 94, 143, 149, 153, 164, 165 and 303 are respectively, 
Stomatopora frondosn, Aspidopora calycula, Batostomclla gracilis, Bythopora 
dclicatula, Leptotrypa clavacoidea, L. discoidea and Plcurotomaria ohiocnsis. 
With regard to the last I will at once concede that the species should be 
credited to Mr. U. P. James and not to Hall as it appears in the list. 
This is purely a clerical error. Prof. James commits another when he 
states that we have credited the name to Nicholson. The authorities 
