22 ZOOPHYTES. 



Plate V. Flustra trimcata. 



Fig. 6. Ciliated gemmule or corpusculum free. 



7. Group of gemmules of variable form. 



8. Cluster of three become stationary. 



9. Cluster of four become stationary. 



10. Stationary gemmule, extending with a peak. 



1 1 . The same farther advanced by the leaf rising at one end. 



12. The same farther advanced by developement of a hydra. 



13. Nascent hydra in its cell, forming the foundation of a specimen. 

 All the figures, except fig. 1, are enlarged. 



Plate VI. Flustra trimcata — luxuriant specimen. 



§ 4. Flustra papyracea ? — Plate VII. — Had it not been for the 

 correct representation of a beautiful subject, I should have omitted this 

 species, because I find nothing sufficiently illustrative to offer along with 

 it. Besides, when obtained, it received very transient notice, owing to 

 various circumstances. 



The specimen which reached me in October was four inches high, 

 and expanded six inches. It rose by a stem, not unlike that of the 

 Flustra trimcata ; but the whole product was of very different appearauce. 

 The proportions were much larger, the leaves less numerous, and the ex- 

 tremities, in particular, infinitely fewer than belonging to a specimen of 

 the trimcata half the size. Both sides of the leaf were of fine, soft, silky, 

 or lawn-like aspect ; both occupied by hydra?, and some parts by ova or 

 gemmules. The colour of the whole product was a little darker than 

 wine-yellow. 



No other specimen having ever occurred, I can only conjecture its 

 position among the Flustrae. 



Plate VII. Flustra papyracea ? 



The reader will find much interesting matter regarding the preceding 

 Flustrae, in the observations of Dr Grant, the learned Professor of Com- 



