PLATE XXXIX. 



FIG. 



1. UMBONULA* VERRUCOSA, p. 317; littoral form. 



2. , with ocecia, from deeper water. 



3. PORELLA STRUMA, p. 329. 



4. . 



5. , older state. 



6. SCHIZOPORELLA SANGUINEA, p. 252. 



7. , erect growth. 



8. MUCRONELLA PAVONELLA, p. 376. 



9. - , incmsting form. 



10. , erect foliaceous form. 



* The name stands as UmboncHa in the text ; but this form has already 

 been employed as a generic term. 



