300 Raymond — Common Devonian JBrachiopods. 



Row 3. — Partial series of Orthothetes bellulus Clarke ; dorsal valves, x 2. 

 Rows 4 and 5. — Series of Chonetes mucronatus Hall ; ventral and dorsal 

 valves, x 2. 



Row 6. — Series of Cyrtina hamiltonensis Hall ; dorsal valves, x 2. 



Plate XVI. 



Rows 1 and 2. — Partial series of Spirifer mucronatus Conrad ; dorsal 

 valves. 

 Row 3. — Series of Chonetes coronatus Conrad ; ventral valves, exterior. 

 Row 4. — The same ; dorsal valves, interior. 



Plate XVII. 



Rows 1 and 2. — Series of Chonetes robustus Raymond ; ventral and dorsal 

 valves, x 2. 



Rows 3 and 4. — Series of Strophalosia truncata Hall ; dorsal and ventral 

 valves, x 2. 



Plate XVIII. 



Tropidoleptus carinatus Conrad. 



Rows 1 and 2. — Series of ventral valves. 

 Rows 3 and 4. — Series of dorsal valves. 



