GUERNSEY COUNTY. 223 
5. Lophophyllum. Sp. undetermined. 
®, IPROCMCHNS SST ARTOMIANTS, ..c0b6 sbcosolésooou b6b5 so oSoooGbORCE Martin, Sp. 
7, IPROGTCKTS JPRAWIBTOMUS .566456 664666 dodges dq6560 codso0 oo50GeRCE Norwood. 
SB,  TProwlieining NG OPASECINEIEY Suds BacbossoScKo bosses Saou boooodcos0es Owen. 
9, Productus punctatus. 
10, IProclacims loOmmisobNo6os 5 db5 bbb 666 5b6 dbo bobd65K85 6odeg5edasa Sow. 
11. Productus. Sp. undetermined. 
1D, Clhomeves earamwbilferm .soo54 doaced caegne caccee boudde bacponuesEG Owen. 
1%, Claomanes Simalniitl -6o645dedcso ganone oouenes seneed oboe sudedecan N. and P. 
4,  Oribis car nomk ye by oes SS Se ae ee nana ere Swallow. 
15 IslOMMOROMINIGS CRISS So66d66 coacds Gesds6odbb65 565660656400 cK0e6 M. and H. 
1G, INavine@nomellle, OSASEWENS ccoo5bo5us 466665 640000 bobbuE Dbeeao beuC Swallow. 
IVAOM SDIRINGRICATMCRALUSH ssa soem einer obs Cy eels ey ech fe yi Morton. 
ili, fsyorintiere joln@eomnyeaaUIS coo5 co Scen coodce oc BE SEO OR OS OO CRC a rae Shumard. 
1,  Syowaltivere IMGARNS so o6s556 Gaouao babene Bn Obo onEbes Ondo caso g eee Sowerby. 
XO, Sporting, nO 655664 6556 665650 5006 5005 c60000 BudEEsC Shum., Sp. 
Bil, LNewaley POUNCE 66 SS So cose seo bSsmeesaeaos Babeoonaens cobeee Shum. 
2s. AMORTS SUOMI Coe CoO CB eet orion GOS ADECCO UCUCIDROOS COE eeaeHe Hall, Sp. 
23. Discina nitida ? 
24. Nucula (like Nucula ventricosa, H.). 
25. Yoldia (like Yoldia carbonaria, Meek). 
AG, LIMON OIDANINE THORS 666 o6gaGn S66 S50a S465 S506 BadooD 4G bObEde Hall. 
27-28. Bellerophon. 2 sp. undetermined. 
29. Pleurotomaria, Sp. undetermined. 
30. Macrocheilus primogenius .----..-.... We Peis RUG Rae be Leh be iy Conrad. 
31. Macrocheilus. Sp. undetermined. 
32. Cyrtoceras. Sp. undetermined. . 
33. Phillipsia. Sp. undetermined. 
Sammie bALOMUSiCESULUC LOL saris nice sricteyeinin el ee eis) area oie cop atae, Siateverne et Newberry. 
The shales immediately above the limestone frequently contain numer- 
ous specimens of Spirifer cameratus, and it is more than probable that the 
Nucula and Yoldia of the list are from the shales. In some portions of 
the county a slaty coal or bituminous shale is found ten or twelve feet 
above the limeggone, but it is of no value at any point where seen. 
Coal No. 7b is worked at various localities in Madison, Jefferson, Cen- 
ter, and Cambridge townships. It is variable in thickness—four feet in 
Madison to ten inches in Knox—but is persistent, having been traced 
from Carroll county, through Harrison and Guernsey, to within three 
miles of the Muskingum River, in Muskingum county. It is seldom of 
economical value, being usually a cannel coal of low grade. 
The interval between the Crinoidal limestone and Coal No. 7a seems 
to increase southwardly, for in Adams township a peculiar buff limestone 
is found seventy-five feet above the coal and from fifty to seventy feet 
below the crinoidal. Above this limestone, which is fossiliferous, there is 
