PLATE XXX. 



FIG. 

 1, 2. MlCROPORELLA VIOLACEA^ p. 216. 



3. , var. a. 



4. , Crag form, showing tlic diversities in 



the size of the zooecium. 



5. SCHIZOPORELLA CRUENTA, p. 270. 



6. SCHIZOPORELLA VENUSTA, p. 276. 



Q a, , showing the form of the orifice and the 



avicularian area. 



7. , showing a group of more or less aborted 



cells. 



8j 9. SciIIZOrOKELLA DISCOIDEA; p. 265. 



