DISTRIBUTIOX OF SPECIES. 27 



CLAIBORNIAN STAGE. 



LOWER CLAIBORNE. 



Alabama, Mississippi, and Louisiana. — Fov Alabama, Mississippi, ancl Louisiaua, 

 excepting Natchitoches, the species are very nearly the same in all of these 

 States for this division of the Claiborne, and apparently all belong to that 

 horizon of the Lower Claiborne called the Lisbon beds. 



The following- are the species : 



Flabellum cuiieiforme Lonsdale. Trochocyathus depressus Yanghan. 



Flabelluiii cuneiforiiie var. pachyphyllum Paracyatlius alternatus Vaughan. 



Gabb and Horn. Paracyatbns belhis Vaughan. 



Flabellum cuneiforme var. acutiforuie Discotiochus orbiguianus M.-Edw. and H. 



Vaughan. Balauophyllia desmophyllum M.-Edw. and 

 Flabellum cuneiforme var. fragile H. 



Vaughan. Endopachys maclurii (Lea). 



Flabellum lerchi Vaughan. Endopachys lonsdalei Vaughan. 



Platytrochus stokesi (Lea). Dendrophyllia striata Vaughan. 



Turbinolia pharetra Lea. Dendrophyllia lisbonensis Vaughan. 

 Turbinolia wautubbeensis Vaughan. 



No recent species of Platytrochus or Discotrochns are known. 



There are no strictly shallow-water genera, but all of the recent gen- 

 era, excepting Endopachys^ (whose bathymetric distribution we do not 

 know), Turbinolia, and Trochocyathus, occur in shallow water. Trochocy- 

 athus ranges from 100 to 750 fathoms in depth, and Turbinolia from 100 

 to 220 fathoms. 



The data at hand are not sufficient for a more definite detennination 

 of depth than is afforded by the Trochocyathus and Turbinolia — i. e., the 

 probable depth is 100 fathoms or more. 



The species from Natchitoches, Louisiana, are: 



Amphihelia natchitochensis Vaughan. Endopachys maclurii (Lea). 



Madracis ganei Vaughan. Balanophyllia augustiuensis Vaughan. 



The depth at which these beds were laid down is probably about the 

 same as that at which the other Lower Claiborne deposition took ])lace. 



' In our Eoceue this genus sometimes occurs associated with shallow-water genera. 



