134 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 52 



Pi'isinopora sparsipora (Hall). 



Prismopora triquetra Hall. 



Ptiloporella ? bifurca (Ulrich). 



Retcporidra adnata (Hall). 



Rhoiiibopora lineinoides Ulrich. 



Rhombopora lincinoidcs-lmmilis Ulrich. 



Scalaripora scalarifonnis Hall. 



Scalaripora subconcava Hall. 



Selenopora circincta (Hall). 



Selenopora complexa (Hall). 



Semicoscinium biimbricatiun (Hall). 



Semicoscinium biscrritlatum (Hall). 



Semicoscinium interruptum Hall. 



Semicoscinium latijimcturum (Hall). 



Semicoscinium lunulatum (Hall). 



Semicoscinium p'Crmarginatnm Hall. 



Semicoscinium planodorsafum Ulrich. 



Semicoscinium rhomboideuin Front. 



Semicoscinium semirotundum (Hall). 



Semicoscinium tortuni (Hall). 



Semicoscinium iuberculatum Front. 



Stroiopora permimita Ulrich. 



Thamniscus nanus Hall. 



TrematcUa annulata (Hall). 



Trematella arborea (Hall). 



Unitrypa acaulis (Hall). 



Unitrypa anonyma (Hall). 



Unitrypa fasti gat a (Hall). 



Unitrypa tcgulata (Hall). 



Feet 



Silurian. 



Niagaran limestone : 



Lonisville formation 38+ 



Argillaceous, cherty limestone, with the upper 8 feet crowded 

 with fossil corals. Bluish, compact limestone below with few 

 fossils. Fentameroid brachiopods are the prevailing forms 

 in the lower bed. 



The molluscan part of the Louisville formation fauna is listed 

 on a succeeding page. The fossil corals have been described 

 or illustrated by Hall, Rominger, Greene, and Davis, par- 

 ticularly. The list is large and no doubt many synonyms 

 exist. The following forms are either very common or char- 

 acteristic of the upper coral bed : 



Alveolites niagarcnsis Rominger. 



Aniplexus sliumardi (Edwards and TTaimc). 



Anisophyllum trifurcatum Hall. 



Calceola tennesseensis Roemer. 



Cladopora complanata Davis. 



Cladopora cquisetalis Davis. 



Cladopora reticulata Hall. 



Cwnites verticillaia (Winchell and IMarcy). 



