SOME FAUNAL PECULIARITIES 65 



The faunal aspects of the bed in question are particularly 

 Interesting. Some of the more common as well as the more 

 important species may be enumerated as follows: 



Gonlatites oeagensis, Swallow. 



Phanerotinus paradoxus, Winchell 



Capulus paralius, Wdite & Whitfield. 



Capulusformosus, Keyes. 



Porcellia nodusa, Hall. 



Loxonema prolixa, White & Whitfield. 



Spaerodoma penguis, (Winchell). 



Pleurotomaria sp ? 



Omphalotrochus springvalensis, White. 



Holopea subconica?, Winchell. 



Straparollus ammon, White & Whitfield. 



Euomphalus luxus?, White. 



Murchisonia sp.? 



BellerophoD bilabiatus, White <fe Whitfield. 



Allorisma hannibalensis, Shumard. 



Edmondia nuptialis, VVinctiell. 



Edmondia burlingtonensis, White & Whitfield. 



Conocardium sp.? 



Lithophagus occidentalis, (White & Whitfield). 



Aviculopecten circulus, Shumard. 



Lingula melie, Hall. 



Discina newberryi, Hall. 



Terebratula rowleyi, Worthen. 



Productus arcuatus, Hall. 



Productus laevicostus. White. 



Productella shumardiana, (Hall). 



Rhynchonella missouriensis, Shumard. 



Spirifera peculiaris, Shumard. 



Strophonema rhomboidalis, var. 



The forms in the accompanying list are all species which 

 characterize the Kinderhook of Burlington, Iowa, and most of 

 them were originally described from that place. In addition, 

 many other species of lamellibranchs, brachiopods and gas- 

 teropods, which occur very abundantly at the latter locality, 

 are found in the white chert of Louisiana, along with a few of 

 the Burlington limestone species. 



It is to be noted that : 



( 1 ) The fauna of this horizon is predominantly molluscan, 

 presenting a marked contrast to that of the typical Burlington 

 limestone, which is principally crinoidal, with comparatively 

 few brachiopods. 



