PLATE V. 



ZOOPHYTES, POLYPS, XANTHIDIA, ETC. 



1. Fungi A agaiicifonnis. 



2. Alcyonium, Cydonium Molleki. 



3. Cydonium, with polypa protruding and tentacles expanded, others cloyed. 



4. Xanthidia in flint. 



5. Madeeporh Abeotanotdb. 



6. Madbepocs cell magnified, showing its internal Btructure. 



7. CoBALLiD^: Corals. 



8. CouAi^, with polyps magniiaed and protruding from the cells. 



9. GoRGONiA nobilis, with polyps magnified and expanded. 



10. TUBIPOBA MUSICA. 



11. Tube of same, with polyp expanded, one being cut longitudinally to show its 



internal structure. 



12. Sertoxaria, with polyps protruding; others being withdrawn into their cells. 



