Atrypae of the Central Missouri Devonian 45 
PLATE 4, 
12 
Figs. 1—6. Atrypa missouriensis Ee 
1, 2, 3, Views of three pedicle valves. 4, 5 Anterior views 
of three individuals, all from the Callaway Limes stone, east of 
Otterville, Cooper Co., Mo., on the La Mine Rive 
Figs. 7—12 Artype planosulcata Webster 
7. Pedicle view of an average example, 8, 9. Brachial views of 
‘an similar shells. 10. Brachial view of a young specimen. 
Anterior view of fig. 9. 12. Brachial view of plump, well 
preserved example 
