RIPLEY FORMATION. 
21 
Ripley fossils from Tippah County. 
Cassidulus subquadratus Conrad. 
Cassidulus subconicus Clark. 
Hamulus onyx Morton. 
Ostrea tecticosta Gabb. 
Ostrea plumosa Morton. 
Ostrea subspatulata Forbes. 
Exogyra costata Say. 
Anomia argentaria Morton. 
Lima acutilineata Conrad. 
Lima reticulata Forbes. 
Pecten quinquenarius Conrad. 
Camptonectes argillensis Conrad. 
Camptonectes parvus Whitfield. 
Syncyclonema simplica Conrad. 
Syncyclonema conradi (Whitfield). 
Gervilliopsis ensiformis (Conrad). 
Inoceramus argenteus Conrad. 
Inoceramus cripsi var. barabini Morton. 
Inoceramus sagensis Owen. 
Inoceramus proximus Tuomey. 
Pulvinites argentea Conrad. 
Dreissena tippana Conrad. 
Crenella serica Conrad. 
Pinna laqueata Conrad. 
Cucullsea vulgaris Morton. 
Nemodon eufalensis (Gabb). 
Nemodon brevifrons Conrad. 
Pectunculus subaustralis d'Orbigny. 
Nucula cuneifrons Conrad. 
Nucula percrassa Conrad. 
Nucula slackiana Gabb. 
Leda longifrons Conrad. 
Leda pinnaformis Gabb. 
Leda protexta Gabb. 
Trigonia angulicosta Gabb. 
Trigonia eufalensis Gabb. 
Trigonia thoracica Morton. 
Vetericardia crenalirata Conrad. 
Crassatella vadosa Morton. 
Crassatella pteropsis Conrad. 
Cardium alabamense Gabb. 
Cardium dumosum Conrad. 
Cardium tippanum Conrad. 
Cardium eufaulense Conrad. 
Pachycardium spillmani Conrad. 
Veniella conradi Morton. 
Cyprimeria depressa Conrad. 
Cyprimena alta Conrad. 
Aphrodina tippana Conrad. 
Tenea pinguis Conrad. 
.ZEnona eufaulensis Conrad. 
Tellimera eborea Conrad. 
Linearia metastriata Conrad. 
Garielliptica Gabb. 
Solyma lineolata Conrad. 
Legumen planulatum (Conrad). 
Leptosolen biplicata Conrad. 
Panopsea decisa Conrad. 
Pholadomya occidentalis Morton. 
Anatimya anteradiata Conrad. 
Anatimya postsulcata Conrad. 
Liopistha protexta (Conrad). 
Veleda lintea Conrad. 
Cuspidaria moreauensis (Meek and Hayden) 
Corbula crassiplica Gabb. 
Corbula perbrevis Conrad. 
Corbula subcompressa Gabb? 
Gastrochaena americana Gabb. 
Pholas cithara Morton. 
Diploconcha cretacea Conrad. 
Dentalium ripleyanum Gabb. 
Scala sillimani (Morton). 
Turritella vertebroides Morton. 
Turritella tippana Conrad. 
Turritella trilira Conrad. 
Laxispira lumbricalis Gabb. 
Trichotropis cancellaria Conrad. 
Lunatia obliquata Hall and Meek. 
Gyrodes crenata Conrad. 
Gyrodes petrosa Morton. 
Anchura abrupta Conrad. 
Anchura rostrata (Gabb). 
Anchura decemlirata Conrad. 
Pterocerella tippana (Conrad). 
Pugnellus densatus Conrad. 
Pyrifusus bellaliratus Conrad. 
Pyrifusus subdensatus Conrad. 
Fusus holmesianus Gabb. 
Fusus tippanus Conrad. 
Strepsidura interrupta (Conrad). 
Perissolax octolirata (Conrad). 
Pyropsis perlata Conrad. 
Liopeplum cretaceum (Conrad). 
Liopeplum canalis (Conrad). 
Liopeplum subjugosum (Gabb). 
Liopeplum leidermum (Conrad). 
Volutomorpha eufalensis (Conrad). 
Rostellites navarroensis (Shumard). 
Nautilus dekayi Morton. 
Baculites ovatus Say 
Baculites anceps Lamarck. 
Scaphites conradi Morton. 
Turrihtes alternatus Tuomey. 
Sphenodiscus lenticularis (Owen). 
The character of the lower Ripley is shown in the hills near Ellistown. These hills, bor- 
dering on the Selma chalk area, rise 150 feet or more above the prairie lands to the east. 
The following section shows the succession of strata on the Ellistown and Ripley road in 
sec. 21, T. 7 S., R. 4 E., in eastern Union County: 
Section of Ripley formation near Ellistown. 
Feet. 
4. Lafayette capping top of hills. 
3. Yellowish, micaceous, coarse-grained sand 20-30 
2. Laminated clayey shale 5-10 
1. Limestone ledge of unknown thickness. 
