584 F. B. Meek—Fossils of the Illinois Geological Report. 
species in the Coal-measures of Illinois, which appear to me to 
connect it so intimately with the genus Huomphalus of Sow- 
erby, as to show it ie be a true mollusk, if not really a species 
of Sowerby’s genus. By comparing the figures cited above 
with the forms mann A by figures 12a, 6, c, 18a, b, ¢ and 
14a, 6, ¢ of the same plate, this will, I think, be apparent 
enough to any one. 
In conclusion, I would remark, in connection with what 
already been said respecting the Coal-measure fossils Taal 
in the Illinois Report under consideration, that a comparison 0 
these forms, particularly those represented on pl. xxvi, with 
those figured by Prof. Geinitz in his ‘‘Carbon-formation und 
_ Dyas in Nebraska,” will, it is believed, clearly show that those 
Nebraska so-called Dyas rocks cannot be separated from the true 
Coal-measures upon any well-defined paleontological evidence. 
I have, however, so fully discussed this subject in the Report 
on the Paleo ntology of Hastern Nebraska, that it is unnec- 
essary more than merely to allude to it here. 
Pleurotomaria Gurleyt ; pl. Xxx, figs. b a, b, c—This species 
was described by me in the Proceed. Acad. Nat. Sci. Philad., 
for August, 1871, page 177. 
Nore.—In addition to the typographical — gets in the list at the end of 
=. volume, the following errata should be co 
ATT, 4th line from top, for “ connection,” mead connections. 
568, 20th line from bottom, for “ yenpe,' - yoaupg. 
a 592, bs ss from top, in explanations of 1. xxv, and — for “ ven- 
” read ventrica ; the latter being the original orth: 
ssbirviy by 
602, 16th line fr om top, for” specimens,’ ” read species. 
Expl Plate Iv, ot eet eee imei,” read Thiemei. . 
16th line from top, for “ small simple arms,” read small simple 
oe ae x, 4th tine from bottom, for page “ 330,” read page 530. 
4 ‘“ XxXIxX, 10th line from re or iy gy ¥, 
Lettering of pl. xxvi, lower left-hand figure, fo: “ 21d,” read 20d. 
It is perhaps hardly necessary to explain that the references 
to the Proceed. Acad. N. S., in connection with the remarks on 
the genera Actinocrinites, on page 339, Batocrinus, page 364, 
Megistocrinus, page 398, we, a e merely intended to designate 
where these remarks were fp eae by us, and not to 
refer to the original ic nis of those genera. 
Jacksonville, Fla., January, 1874. 
