R. P. Stevens on the Coal Measures of Ohio and Illinois. 77 
__Eastern system. Western n system. 
Species. Locality. Strata. Locality. Stra 
Salle, Ii1., Middl ie es. 
Danville, Il. dje shales, 
Macrocheilus cies Pittsburgh, Pa., Calcareous shales. “ ‘ oof of coal. 
and M. inhabilis, - v4 ae te Springfield, IL., Br upper shales. 
Bellerophon Urii, Pittsburgh, Pa., Calcareous shales. ¥ te 
B. pe McKean Co., Pa Cherty fnektone. LaSa bal Middle = shales. 
Yellow Creek, O., pper limestone, /|Galate s Coal meas., N. &P. 
Summit, Col , O. |Caleareous shales. |Grayville, © 
Coshocton, d limes N. Harmony, Ind.,; © = “ 
‘Tuscarawas, 6., x Rush Cr. se « ‘“ 
B. costatus, sa alte Pa., Calcareous shales. |LaSalle, in., shales. 
Pleurotomaria carbona- : 
ria, * “ “ “ a 
Sammi ‘Col. Co., O. fe - Danville, IL, Roof of coal. 
P. spherulata and ? bs , i : , 
virgillati, Pittsburgh, Pa., 6 as LaSalle es Upper dsica. 
Rush Cr., Ind., = shales, J. i. 
Loxonema Hallii, 
P. Verneuilianus, 
iid 
Calcareous shales. 
Pittsburgh, ze; Calcareous shales. 
Coshocton, O. 
Yellow eect, 0., aged limestone. 
P. semireticulatus, Coshocton, O lst & 2d limestone. 
P. clavus, Yellow Creek, O.,  |Upper limestone. 
P. muricatus, — ‘Coshocton, O., at # 
P. equicostatus, sia Ist & 2d limestone.|LaSa 
Natica ventricosa, Yellow Creek, 0., Upper limestone. 
gre ee 
Ne Sinton” 
Temneshetidh; » spec. ? 
Goniatites crenistria, 
Las 
Pittsburgh, Pa., 
Yellow Creek, O., 
Summit, Col. Co. 0. 
rad oe 5 
‘Calcareous shales. 
ce “ 7 
Middle shales. 
Calcareons shales. 
Mc oe o 
Danville, iL, Roof of coal. 
Chonetes mesoloba, Mahoning Co., O., lst limestone, id 4 : + 
Coshocton, O., 2n " LaSalle, “ Upper shales. 
Yellow Creek, O., Upper limestone. |Centralia, ‘ me: oh 
Productus scabriculus, Tioga, Pa., Iron-stone shales. |LaSalle, © 06 " 
|McKean, | a = S anville, * of 
Mahoning Co., O., - ed a Pine Creek, Ind., |Lower shales. 
P. splendens, te Creek. O., ope limestone. |LaSalle, Ill., Upper freeones oe 
oshocton 2n i his yo rble lim: e 
P. Wabashensis, Tuscarawas, b., 4s i 1 oie we 
. Yellow Creek, 6., Hyd, limestone, Danville, IIl., ae below 
N. Harmony, Ind., ‘Coal meas. a N.&P. 
P. Rogersii, ae « se Danville, lil, ‘Roof o 
“bh Z pper limestone. 
* J.H.McC, 
Coal measures. P. 
ce ia3 
APpPpENDIX.—Since preparing this article for the press, I have 
been favored, through the pollieoart of one of the editors | of 
this Journal, with the peru uereux’s highly inter- 
ng report on the fossil flora of western Kentucky, in vol. iii 
of the Kentucky Geological Sur ugeey _Through Dr. J.S. Jd 
berry of Cleveland, Ohio, I had previously received the main 
features of his theory of tas fapmpton.of coal. I am very free 
to say, that all my theo in sti poner more and 
more stron 
