Cymodocea. Z. HYDROIDA. 159 



tioned. IMr J. E. (Jray, a high authority in matters of this kind, 

 says, " the Cymodocea) appear to be only Sertularite which liave lost 

 their cells," (Synop. of Brit. Mus. p. 75) ; and Blainville makes the 

 same assertion in reference to the above species.* Dr Fleming is of 

 opinion that C. simplex has been established from an individual of 

 Campanularia dichotoma in a depauperated state ; (Brit. Anim. 548,) 

 while again IMr Hogg informs me that he is almost satisfied that this 

 Cymodocea is Plumularia pinnata with its pinnae rubbed off by the 

 waves or tide on the beach ; and the specimens he has sent me in 

 confirmation of this supposition are certainly very exact to Lamou- 

 roux's figure, nat. size, — for it must be observed that his magnified fi- 

 gure represents the polypidom as unjointed or continuous, whereas it 

 is regularly jointed both in the Campanularia and Plumularia. But 

 I make this remark not to invalidate the opinions either of Dr Flem- 

 ing or Mr Hogg, for that of the latter I am disposed to adopt ; but it 

 gives me an opportunity of warning the student against an implicit 

 reliance on the figures of Lamouroux, which we are assured by Blain- 

 ville, who has compared them with the specimens from which they 

 were made, are in many instances very erroneous. 



* Milne-Edwards also adopts this view. Lam. Anim. s. Vert 2de edit- ii. 

 157. 



" All the works of the Lord are exceeding good : and none may say, What is 



this ? Wherefore is that ? for at time convenient they shall all be sought out 



All the works of the Lord are good : So that a man cannot say, This is worse 

 than that ; for in time they shall all be well approved." — Ecclesiasticus. 



