148 Cincinnati Society of • Natural History. 



stones below it to the bottom of the Kentucky river gorge, are lower 

 than that part of the Ottawa Trenton studied by Mr. Billings. 

 Further south, and about two miles west of Harrodsburg junction, 

 are several more or less heavil3"-bedded limestones, containing one or 

 two la3'ers which hold many specimens of very large bivalve 

 Crustaceans; LepercUtia, Isochilina, etc., as yet undescribed. Below 

 these strata, and overl3dng the siliceous rocks mentioned above, there 

 are thin limestones holding immense numbers of fine Brj^ozoans, 

 Ftilodictya^ etc., and numerous specimens qZ Mont iciilipor a white- , 

 eavesii^ Nicholson, together with other species of 3fontiGuUpora or 

 Chcetetes. Its lithological characters and fossil contents are those of 

 Safford's Pierce Limestone; but it does not occupy the same place in the 

 section. The lower part of that portion of the section which I have 

 referred to the Glade Limestone holds great numbers of Gasteropods, 

 among which are very large specimens of Pleurotomaria suhconica 

 Hall, and an unidentified Subulites, more than three inches in length. 

 This portion furnishes a numerous list of fossils of very high interest. 

 The new Heterocrinus? which I have described in this paper, came from 

 this part of the section. Below this, nothing of importance has been 

 collected outside of the Cephalopoda, among which are an Oncoceras, 

 an Ormoceras, several species of Or^/ioceras, Cyrtoceras and Undoceras. 

 In a verj" thin parting of cherty limestones, at the very lowest portion 

 of the o'oro^e, are numerous fraoments of Trilobites, as well as a few 

 Brachiopods and Corals. While it is not diflScult to separate this 

 section into groups, having approximate relations with those of Prof. 

 Safford's Tennessee section, it is not here pretended that this reference 

 has been verified in any case. The lithological characters indicating 

 such an equivalence are more marked, by far, than those evidences to 

 be derived from the fossils. This is even the case in the heavy-bedded 

 limestones of the lower part of the section. The fragments of Trilobites 

 obtained from this portion indicate very low Trenton or even Chazy. 

 I have not been able to give such attention to the study of anj' of the 

 fossils except those enumerated above, as to enable me to pronounce 

 definitely upon this matter. I trust to be able to explore this in- 

 teresting field thoroughl}^ during the summer, and to have the good 

 fortune to make a fuller collection of its typical fossils. It is worthy 

 of notice that local faultings and disturbances have made it necessar^^ 

 to proceed with extreme caution. 



Immediately on the line of the Cincinnati Southern Railroad, one mile 

 from High Bridge, a locaul faulting has brought down the upper part 

 of the section to a level with the middle of the third. These disturb- 



