Mr. S. V. Wood^s Catalogue of the Zoophytes from the Crag. 11 



specting the temperature of the coraUine-crag sea must be highly 

 conjectural where such incongruous forms are associated, I should 

 still be disposed to adhere to the opinion I have already expressed 

 as to the probability of its approximating that of the coast of 

 Portugal. A current of water like that which now rolls through 

 the Gulf of Florida may have introduced Pyruhy Pholadomya, 

 Lingula and other tropical forms, or these genera, at the time of 

 the coralline crag being deposited, might have been the only 

 living representatives of a tropical fauna otherwise extinct. 



The fauna of the red crag must, I think, be regarded as in- 

 dicating a temperature much lower than that which existed 

 during the deposition of the coralline crag. The general cha- 

 racters of its Polypifera agree with those of our own seas, for I 

 consider my red-crag specimens of Theonoa and Fascicularia to 

 have been introduced into this deposit from the underlying 

 coralliferous beds. The greater part of my red-crag corals are 

 attached to the mouths of univalves or the interior of bivalves. 



I have not as yet seen any corals from the mammaliferous crag. 



Though many of the crag polypidoms are in a very perfect con- 

 dition, others, particularly among the Escharida, from various 

 causes, have undergone structural alterations which render their 

 correct determination often a matter of great difficulty. Flustra 

 memhranacea, for example, is generally found with nothing but 

 the bare walls of its cells remaining, and other species have had 

 prominent parts entirely removed; these alterations are wholly 

 independent of that change which takes place in the external 

 covering of the cells during their progress to maturity, so ably 

 pointed out by M. Edwards in his essay upon the Escharidce, 

 and which may be seen in various cells on the same specimen. 



The following are from my own cabinet except where otherwise 

 expressed. 



Class ZOOPHYTA. 



Fam. LAMELLIFERiE. 



Balanophyllia, n. g. 



Polypidom permanently fixed, simple, exterior striated longitudi- 

 nally ; disc stellated, with a central style ; lamellae radiating in trios, 

 converging to a point at the circumference. 



This differs from Caryophyllia in the tripartite arrangement of 

 the lamellae, and from Dendrophyllia in not being dendroidal. 



Cor. Crag, Red Crag. Recent.. 



1. Balanophyllia calyculus, n. s. 



I Sutton. I 

 " Polyp, subcylindrical ; disc subovate, cup- shaped, with an elongate 

 central style ; lamellae radiating and fasciculated, sides of lamellae 

 finely granulate, exterior rugosely striate." — Mag. of Nat, Hist. vol.m. 

 1830, p. 272. f. 60. d. 



