368 



Trans. Acad. Sci. of St. Louis. 



DISTRIBUTION OF UPPER FAUNAS AT LOUISIANA. — Continued. 



SPECIES. 



Lower 

 BuilingtOD, 



13 14 15 16 17 



V to 



n 



18 19 20 



Oapulus paralins (Keyes) 



OapulaB obllquus (Keyes) 



Capulus tribulosus (White) 



Orothonychia formosus (Keyes) 



Pleurotomarla subcarbonaria, Keyes 



Pleurotomarla sp ? 



Pleurotomarla sp? 



Holopea conica, Wlnchell 



Porcellia nodosa. Hall 



Crytoceras sp? , 



Goniatltes sp? 



Gonlatltes osagensis, Swallow 



Nautilus sp? 



Orthoceras sp? 



Avlculopecten burlingtonensis, Meek 



& Worthen 



ATiculopecten circulus, Shumard. . . 



Cardiopsis sp 



Oonocardlum sp? 



Crenlpecten sp? 



Cypricardella sp? 



Edmondla burlingtonensis, White and 



Whitfield 



Edmondla nuptialls, Wlnchell 



Nuculites sp? 



Sanguinolites burlingtonensis, Wor 



then 



Sphenotus sp? 



Llthophaga occidentalis (White and 



Whitfield) 



Philllpsia insignls, Wlnchell 



PhlUipsia tuberculata. Meek and 



Worthen 



Philllpsia sp? 



The most striking features in the vertical distribution of the 

 fossils shown in the tables given are: (1) The upper fauna 

 nowhere extends beneath the base of the Chouteau (No. 12), 

 and the lower fauna nowhere rises above the same line; (2) 

 the species belonging to the fauna beginning in the Chouteau 

 extend upward into the Burlington; (3) while in the Bur- 

 lington many new forms appear, there is not an immediate 

 replacement of the older forms; and (4) the many new 

 species which appear in the second bed of the Burlington 

 (No. 14) are largely so-called Kinderhook forms, not alto- 

 gether from the Chouteau of the immediate neighborhood but 

 from the limestones which occur just beneath the Burlington 

 limestones in other localities, as at the city of Burlington. 



