DlCTYOSPONGID.£. 



433 



ACLCEODICTYA, gen. nov. 



Page 369. 

 (See Plates LIV, LV, LX, LXI.) 



ACL(E0DICTYA MARSIPUS, Sp. IIOV. 



Page 370. 

 (See Plates LV, LX, LXI.) 



Figures 7, 8. The basal parts of two specimens, showing the character of 

 the reticulum and the broad curvature at the basal edge. 

 Keokuk group. Indian Creek, Indiana. 



