EXPLANATION OF PLATE XXXV. 



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FIG. 1. Conularia missouriensis 218 



la. Large fcpecimen. (Mus. Mo. Geol. Sur.) 

 Ib . CroBs-section of same . 



Carboniferous, Saint Louis limestone . 



FIG. 2. Conularia crusfila 219 



Medium-sized specimen. (Mus. Mo. Geol. Sur.) 

 Carboniferous, Upper Coal Measures. 



FIG. 3. Tentaculites incurvut 217 



Sa. Type. (After Shumard ) 

 8b. Part of same (enlarged) . 



Silurian, Girardeau limestone. 



FIG. 4 . Lingula umbonata 38 



Average-sized specimen. 

 Carboniferous, Upper Coal Measures. 



FIG. 5. Lingulella lamborni 38 



Views of different specimens. (Mus. Mo. Geol. Sur.) 

 Cambrian limestone. 



FIG. 6. Discinanitida 39 



Several examples on shale. 

 Carboniferous, Upper Coal Measures. 



FIG. 7 . Discina convexa . 40 



A large specimen. 



Carboniferous, Upper Coal Measures. 



