Fig. 1 
Fig. 2, 
Fig. 3. 
Fig. 4. 
PLATE IV. 
Halysites pycnoblastoides, Eth. fil. 
Corallum seen from above, exhibiting the highly farcimentiform outline of the corallite 
chains, and gemmuliferous appearance of the autopores, and limited number of the 
latter in any given chain. 
Corallum seen in longitudinal aspect. 
Ha lysites cratus, Eth. fil. 
Aii irregularly grown corallum, seen from above, with very large fenestrules. 
Corallum seen from above, exhibiting labyrinthine and somewhat crowded fenestrules, 
highly farcimentiform corallite chains, and large autopores. 
