PLATE LVIT. 



FIG. 



1. Lepralia unicornis, p. 321. 



2. Lepralia coccinea, p. 322. 



3. Lepralia coccinea, |3, p. 322. 



4. Lepralia ciliata, p. 323. 



5. Lepralia ciliata, |3, p. 323. 



6. Lepralia spinifera, p. 324. 



7. Lepralia trispinosa, p. 324. 



8. Lepralia immersa, p. 325. 



9. Lepralia violacea, p. 325. 



10. Lepralia bispinosa, p. 326. 



11, 12. These figures represent states probably of Membrani- 



pora membranacea, p. 328. They were taken from dif- 

 ferent portions of the same specimen ! 



