Bradley. — Brachiopoda of the Maquoketa of Iowa. 



PLATE 1. 



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



X 1.35. 

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



X 1.31. 

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



X 2.23. 

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



X 1.32. 

 Fig. 5. — Strophomena acuta Winchell and Schuchert. A brachial-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 laminata Bradley. Pedicle- and brachial-valves of 



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



