350 HISTORY OP BRITISH ZOOPHYTES. 



that you must examine the fishermen's nets and boats 

 at Newhaven." Dr. Grant has calculated that a com- 

 mon specimen of F. carlasea presents more than 18,000 

 polypi, 396,000 tentacula, and 39,600,000 cilia on these 

 tentacula. How much life and active enjoyment on a small 

 polypidom ! 



5. FLUSTRA SETACEA, Prof. John Fleming. 



Hab. Along with Cellipora cervicornis, from deep water, 

 Zetland, Fleming. Height two inches ; branches linear, of 

 an inch in diameter, brittle. 



6. FLUSTRA AVICULARIS, Fan-shaped Sea-Mat, Ellis. 

 Hab. Attached to other corallines and old shells, in deep 



water. Peterhead, on F. foliacea and F. tmncata, Mr. 

 Peach. 



Our first specimens of this pretty little Flustra were 

 from Mr. Tudor, of Bootle, attached to F. foliacea; our 

 next were found by Miss M'Leish, on the banks of the 

 Dee, below Chester, where F. foliacea, with this pretty 

 parasite, is cast out by the tide and lies withering on the 

 shore. It is about an inch in height, fan-shaped, dichoto- 

 mous, segments truncate, cells oblong, with pearly capsules. 



7.- FLUSTRA MURRAYANA, Bean. 



Hab. Scarborough, Mr. Bean, very rare; coast of North- 



