PLATE XV. 



PAGE. 



Fig. 1. Hemipronites crenistria 512 



Ten feet above the Ohio river at Sciotoville. Cuyahoga shale at same horizon as 

 Moots' run. This species is abundant throughout the Waverly in numerous vari- 

 etal forms, deserving close study. 

 Fig. 2. Spirifer marionensis, Shumard. 



Cuyahoga shales, Portsmouth, O It would appear that S. centronota, Winchell 

 applies to the variety of this species which occurs in the northern part of the 

 state and which has frequently 'as by the writer) been identified with S. bipli- 

 catus. The latter is, however, restricted to the upper third of the Waverly and is 

 a smaller species. 



Fig. 3. Hinge View of Spirifer. 



Sp. like S. altus, from Moot's run. ( See Fig. 11. 



Fig. 3. Spirifer tenuispinatus, Herrick. 



Cuyahoga shales, Moot's run. 



Fig. 5. Hemipronites. 



Young individual from Moot's run. 



Fig. 6. Spirifer, sp. 



Keokuk division, Newark. 



Fig. 7. Spirifer deetoideus, Herrick. 



Conglomerate Kinderhooki Granville. 



Fig. 8. Spirifer bipeicatus, Hall. 



Upper layers, (Keokuk and Burlington Newark, O. 



Fig. 9. Spirifer striatiformis, Meek. 



Full-grown dorsal value. Upper layers, Keokuk and Burlington) Newark, O. 



Fig. 10. Spirifer (see Fig. 3.). 



