Fie:. 4. 



io 



C 



[A= Diagram showing peripheral forward curvature of ribs in Schloenhachia 



rnidtifida Steinmann (see p. 267). 

 B, C = Diagrammatic cross- sections of shells of ' '}nnltijida ' and ' helTcnapi ' 



types (see p. 269). 

 D= Diagrammatic view of siphuucle in Schlcenhachia multijida (see 



p. 267). 

 E = Septal - suture line of SclilGenhachia cf. acutocavinata (Shumard) 



Bose.] 



