the Upper Devonian of Iowa. 373 



Paracyclas validalinea "Webster. 



Paracyclas elliptica Hall. 



Glossites lingualis Hall. 



Pterinopecten sp. undet. 



Aviculopecten sp. undet. 

 Gastropoda 



Bellerophon sp. undet. 



Straparollus cyclostomus (Hall). 



Straparollus sp. undet. 



Platyostoma ( ?) insolitum Webster. 



Platyostoma ( ? ) modestum Webster. 



Platyostoma ( ? ) antiquum Webster. 



Diaphorostoma cf. ventrieosum (Con.). 



Cyclonema sp. undet. (nov. ?). 



Pleurotomaria verticillata Webster. 



Holopea (?) iowensis Webster. 



Naticopsis gig^antea H. & W. 



Naticopsis gigantea hackberryensis Webster. 10 



Naticopsis gigantea websteri nom. nov. 11 



Naticopsis magnificentis Webster. 



Floydia concentrica Webster. 



Floydia concentrica multisinuata Fenton. 



Loxonema hamiltonensis Hall. 



Loxonema cf . pexatum Hall. 

 Cephalopoda 



Orthoceras berryx Hall. 



Orthoeeras consortale Hall. 



Orthoceras sp. undet. 



Gomphoceras sp. undet. 



Manticoceras pattersoni (Hall). 

 Foraminifera 



Various undetermined forms. 

 Pisces 



Ptyctodus calceolus H. & W. 



Dinichthys pustulosus Eastman. 



Diplodus striatus Eastman. 



Diplodus priscus Eastman. 



Apsidichthys sp. undet. 

 lib: Fossil species of the Striatula zone. 

 Plants 



"Fucoids," of two or three undetermined species. 



10 Described as Naticopsis JiacTcberryensis by "Webster. I do not consider 

 the distinction of this form from N. gigantea H. & W. sufficient to make it 

 more than a variety. (Described in Iowa Naturalist, vol. 2, p. 3.) 



u Described as Naticopsis gigantea var. depressa by Webster, Iowa 

 Naturalist, Vol. 2, p. 3. The name was preoccupied by Naticopsis depressa 

 Winchell, 1863, and therefore the new name websteri is here proposed for 

 the variety. 



