JAMES TYPES OF BBYOZOA—BASSLER. 9 



Brornleij. — This name is applied to the series of drab to darii l)hie 

 sliales underlying- the Trenton limestone outcropping along- the Ohio 

 River bank opposite Cincinnati. These shales are about 80 feet in 

 thickness and are well exposed along the river just below Bromley, 

 Kentuck3^ The characteristic fossils are trilobite remains and a 

 form of Dahnanella, both of which occur in comparative abundance, 

 although other fossils are rare. This division is probably the equiva- 

 lent of the Hermitage formation of Tennessee. 



Point Pledsanf. — The strata to which this name was applied by 

 Prof. Edward Orton are represented in the vicinity of Cincinnati by 

 the Trenton limestone overlying the Bromley shales. Here, on account 

 of erosion preceding the deposition of the Utica, these limestones are 

 not more than 25 feet thick, but at the type locality a considerable 

 thickness is added to the top. Erldotrypa hriareus is the most charac- 

 teristic fossil, and the strata represent probably the whole of the 

 Bigby and Catheys of Tennessee. 



Coimigton grouj). — This term is proposed to embrace all the strata 

 in the Cincinnati area from the top of the Trenton to the base of the 

 Richmond. It thus includes the Utica and Lorraine of previous 

 authors. 



Fulton. — The typical Utica is represented along the Ohio River by 

 only a few feet (seldom more than 5) of dark gra}' or drab colored 

 shales which contrast very distinctly with the overlying Eden shales. 

 These strata are well exhibited along the Ohio River bank at Fulton, 

 the old name for the eastern part of Cincinnati. Tt'lartJirus hecki^ 

 Leptoholus insignis, graptolites and other typical Utica fossils are 

 abundant. 



Eden. — The Eden shales of Professor Orton may lie divided into three 

 members well marked both faunally and lithologically. Hitherto these 

 have been indicated by the divisions lower, middle, and upper Utica, 

 with the exception that the lower Utica has included both the mem- 

 bers here called Economy and Fulton. 



Economy. — This term, the old name of the village now known as 

 West Covington, Kentucky, is applied to the lower division of the 

 Eden. About 50 feet of blue shales and limestones comprise this 

 member, which is distinguished faunally by a large mmiber of bryozoa, 

 the characteristic species being Ooelodenia conimune., Crej^lpom venvsta, 

 and several forms of AspldopoTa . 



Southgate. — The middle Eden beds are well exposed just south of 

 Newport and Covington, Kentucky, particularly in the vicinity of 

 Southgate, so that the latter name may be employed to distinguish 

 them. This division consists of about 120 feet of blue to yellow shales, 

 with fewer limestones than in the rest of the Eden. The lower beds 

 of this member contain a considerable number of gastropods and pele- 

 cypods, while throughout the entire member, Ctenoholblna elllatK., 



