NO. 1851. WATERLYAN PERIOD OF TENNESSEE— BASSLER. 219 



111 this section the Hardin sandstone, Chattanooga shale, and 

 Maury green shale present their usual characters, differing only in 

 thickness from the same strata elsewhere. The Ridgetop shale has 

 decreased in thickness, although the bed of decomposed, sandy chert 

 is still present at its base. The Kinderhook fauna described under 

 the Ridgetop section is present here throughout this shale. 



Succeeding the Ridgetop shale, instead of the usual siliceous lime- 

 stone of the Fort Payne is a formation of a coarsely crystalline, rather 

 massive crinoidal limestone, with bands of green and blue shale. 

 Both the shale and limestone are highly fossiliferous. Frequently 

 the crinoidal fragments and other fossils are loosely cemented together 

 by a greenish shale, which, upon weathering, leaves the ground 

 strewn with an abundance of specimens. The lithology and general 

 method of preservation is exactly the same as in the Knobstone of 

 Indiana and Kentucky, except that in Tennessee the limestone pre- 

 dominates, while in the more northern areas the shale is much more 

 conspicuous. The fossils likewise are identical so far as they have 

 been collected and identified. Among the bryozoans, Rhomhopora 

 incrassata ITlrich, the most abundant and characteristic bryozoan of 

 the Knobstone, or, as it should now be called, the New Providence 

 shales, is likewise very common here. Fenestella regalis, Cystodictya 

 pustulosa, and PtiJopora cylindracea of Ulrich, and other bryozoans 

 known from the Knobstone, are also present. The brachiopod 

 RJiipidomella michelinia L'Eveille, and Clionetes illinoisensis Norwood 

 and Pratten, are as abundant as in the Kentucky strata. The 

 fauna, including the echinoderms which Mr. Springer has identified 

 specifically, is as follows: 



Fauna of the New Providence formation, Whites Creek Springs, Tenn. 



Favosites valmeyerensis Weller. 

 Beaumontia americana Weller. 

 ZapJirentis cliffordana Edwards and Haime. 

 Amplexus rugosus Weller. 

 Amplexus hrevis Weller. 

 Cladoconus americana Weller. 

 Monilopora crassa (McCoy) . 

 RJiipidomella michelinia L'Eveille. 

 Chonetes illinoisensis Worthen. 

 Spirifer vernonensis Swallow. 

 Lasiocladia Jiindei Ulrich. 

 Rhomhopora incrassata Ulrich. 

 Cystodictya pustulosa Ulrich. 

 Fenestella regalis Ulrich. 

 Ptilopora cylindracea Ulrich. 

 Meticlithyocrinus tiaraeformis (Troost). 

 Barycrinus cornutus (Owen and Shumard) . 



