Bhaolsi • Brachiopoda of the Maquoketa ol I 



PLATE 1. 





Fig. 1. — Plectorthis (Austinella) ichitfieldi (N. H. Winchell). A pedicle-valve. 



X 1.35. 

 Fig. 2. — Plectorthis (Austinella) kankakensia (McChesney). A pedicle-valve. 



X 1.31. 

 Fig. 3. — Hebertella clermontensis Bradley. A pedicle-valve, the hole-type. 



X 2.23. 

 Fig. 4. — Dinorthis proavita Winchell and Schuchert. A pedicle-valve. 



X 1.32. 

 Fig. 5. — Strophomena acuta Winchell and Schuchert. A braehial-valve. 



X 1.85. 

 Fig. 6. — Strophomena abscissa Bradley. The brachial- valve of the holotype. 



X 2.00. 

 Fig. 7, 8. — Strophomena wisconsinensis Whitfield. Cardinal and dorsal 



views of a specimen. X 2.00. 

 Fig. 9, 10. — Strophomena lamiuata Bradley. Pedicle- and brachial-valves of 



the holotype. Fig. 9, X 1.93; fig. 10, X 2.10. 



