the Upper Devonian of Iowa. 3C>9 



Alveolites rockfordensis H. & W. 



Cladopora robusta Rom. ( ?) 



Aulopora iowensis H. & W. 



Aulopora cf. saxivadum H. & W. 

 ^-Aulopora annectens Clarke. 



Aulopora cf . serpens Goldf. 



Aulopora n. sp. ? 



Syringopora sp. undet. 

 Hydrozoa ( ?) 



( Stroniatoporoidea) . 



Stromatoporella solidula (H. & W.). 



Stromatoporella incrustans (H. & W.). 



Syringostroma ( ?) planulatum (H. & W.). 



Idiostroma two sp. undet. 

 Vermes 



Spirorbis omphalodes Goldfuss. 



Forms probably belonging to the Tubulifera. 

 Echinodermata 



sp. undet. 



Melocrinus sp. undet. 

 Bryozoa 



Hederella alternata (H. & W.). 



Hederella sp. undet. 



Lioclema (?) sp. 

 Brachiopoda 



Schizophoria striatula (Schloth.). 



Leptostrophia canace (H. & W.). 



Strophonella reversa Hall. 



Productella hallana Walcott. 



Atrypa reticularis (LinnaBUs). 



Atrypa hystrix Schloth. 



Atrypa hystrix planosulcata Webster. 



Spirifer orestes H. & W. 



Spirifer ( ?) hungerfordi Hall. 



Spirifer whitneyi Hall. 

 Pelecypoda 



Paracyclas validalinea Webster. 



Paracyclas sabini White. 



Paracyclas elliptica Hall, var. 



Leptodesma sp. undet. 

 Gastropoda 



Bellerophon sp. undet. 



Straparollus cf. cyclostamus Hall. 



Ceneostoma, sps, undet. 



Pleurotomaria sp. 



Diaphorostoma lineatum (Con.). 



Floydia concentrica Webster. 



Naticopsis gigantea H. & W. 



