BjL&n bi Braohiopoda <>i tin- llaquoketa <>t [owa. 



PLATE 2. 



Fig. 1. — Rafinesqydna subquadrata Bradley. A pedicle-valve, the holotype. 



X 1.68. 

 Fig. 2. — Rujinesquina altidorsata Bradley. A pedicle-valve, the holotype. 



X 1.46. 

 Fig. 3, 4. — Leptaena raymondi Bradley. Pedicle- and brachial-valves of the 



cotypes. X 1.85. 

 Fig. 5. — A slab of limestone with numerous specimens of Leptaena unicostata 



(Meek ami Worthen) and some other fossils, notably Plecta/nbunites 



rugosus (Meek), on its surface. From the Upper Maquoketa near 



Brainerd, Iowa. X 0.44. 



