[ 237 ] 168 



RAPIDS OF THE DES MOINES. 



Delthyi'is duplicostata, {Spirijera duplicosiata of Phillips.) 

 Delthyris bisulkata, (Sow.) — allied to spirifera. 

 Delthyris spirifera^ {semicircularis (?) Phillips.) 



, (two new species.) 



Froducla punctata^ (Sowerby.) 



. , (two new species.) 



Crinoidece. 

 Turhinolia fuiigites. 



BURLINGTON BLUFF, IOWA. 



Delthyris; large species, allied to spirifer bisulcata, and the same as that of 



the " Rapids Des Moines." 

 Delthyris, (undetermined fragment.) 

 Producta hef7iispherica (?) — (Sowerby.) 

 Orthis; small, unknown species. 

 Strophomena ; impressions of a small species. 

 Crinoidece, (undetermined.) 



MINERAL REGION OF WISCONSIN TERRITORY — GALENA AND ITS VICINITY. 



Blue limestone y (Dr. Owen and Dr. Locke.) 



Trilobites : — 



A^^nliils U\l\v 1 Trenton limestone, New York, 



CeZurns pleurexanihemus, (Green.) corresponding with the lower 

 Portion of an isotelus gigas) ^ P^.^ f '^^ caradoc-perhaps 



Calymene spinifera, (Conrad.) J ^"*^ '*'^^^* 



Shells. 



Strophomena^ (new.) 

 Strophomena sericea, (Sowerby.) 



g^/'^XL*™'" ''' ( Same of .he Trenton Umes.one, Ne. York. 



Orthis callactis. 



Cypricardltes^ (new.) 



Trochus lenticular is ^ (Sowerby.) Murch. Sil. Syst. 



Pleurotomaria. 



Bellerophon bilobatus. 



Orthoceras, (one species, large.) 



Cliff limestone. 



Jllcenns, (new.) Same species as in the Trenton limestone. 



Strophomena delthoidea. 



ACrypa,{ne'w species.) 



Lingula, (new.) Same with a Trenton limestone species. 



Enomphalus, (new.) 



Orihoceras; fragment, (undetermined.) 



.ill 



