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



cately branched, emitting a cell sometimes from both sides, at others 

 only from one ; it somewhat resembles Hippothoa lanceolata, Gray, 

 ' Zool. Misc.' 35, but differs in having the margin of its aperture 

 armed with eight or nine long denticulations curving inwards. When 

 magnified, the surface of the cells appears finely granulated. 



Cor. Crag. Bed Crag. Recent. 



1 . Flustra distans, Johnston (Flustra Peachii, Couch, Cat. of Zooph. 



of Cornwall). 



I Sutton. I Britain. 

 Identified by Dr. Johnston. 



2. — membranacea, Johnston (Brit. Zooph. p. 287. t. 37. f. 1 — 3). 



Sutton. I Sutton. | Britain. 



This is generally found with the cells open and nothing but 

 the partition-walls remaining. Specimens from the coralline crag 

 are however occasionally met with quite perfect^ showing the 

 form of the mouth and with the obtuse spines at the corner of 

 the cells. 



3. — coriacea, Esper. 



Sudbourn. | | 



Identified by Dr. Johnston. «. 



4. — trifolium, n. s. 



Sutton. I I 



Polypid. adnate, discoidal, radiating ; cells elongato-hexagonal ; 



surface rugose ; centre depressed; aperture irregularly tripartite, 



unarmed. 



On various shells. 



5. — holostoma, n. s. 



Sutton. I I 



Polypid. adnate ; cells radiating, irregular, bordered ; centre de- 

 pressed ; surface rugose ; aperture subcircular, unarmed. 



The cells in form somewhat resemble those of F. flabelliformis, 

 Lamx., ' Expos. Meth.' p. 113. pi. 76. f. 11—13, but it is an en- 

 crusting coral, and the interior of the cells are not parallelograms, 

 and the aperture not so central. On various shells. 



These last two are probably altered forms. 



1. Membranipora pilosa ? Auct, (Johnston, Brit. Zooph. p. 280. pi. 34. 



f. 10—12). 



I Sutton. I Britain. 

 The perforation through the hollow base is visible, but there 

 are no denticles remaining, and as such 1 consider it a doubtful 

 identification. 



2. — membranacea, Johnston MS. (Flustra tuberculata, Johnston, 



Brit. Zooph. t. 34. f. 9. Flustra membranacea, Muller, Zool. 

 Dan. Flustra unicornis, Flem. Brit. An. p. 536). 



Sutton. I I Britain. 



