PLATE III. 
Halysites orthopteroides, Eth. fil. 
Fig. 1. Corallum seen in longitudinal aspect, exhibiting the long corallites and large fenestrules. 
Fig. 2. Corallum seen from above, exhibiting long corallite chains and large fenestrules. 
Halysites Sussmilchi, Eth. fil. 
Fig. 3. Corallum seen in longitudinal aspect, exhibiting the large size and highly farcimentiform 
outline of the autopores, and hence the corrugated surface of the fenestrule laminae. 
Fig. 4. The corallum seen from above displaying similar characters. 
