BRITISH ZOOPHYTES. 187 



Genus IV. Flabellum^ Lesson. 



Corallum simple, free, turbinate, on a very short, 

 crooked, pointed base. Columella slightly developed. 

 No palales. Ribs indistinct. 



1. F. ARCTicuM, Sars. "The Scarlet Crisp Coral." 



Flabellum MacAudrewi {Gray), Ulocyathus arcti- 

 cus (P. E.G.). 



Hab. : Deep water off Shetland. Height li in. 



Colour of animal, orange-scarlet; with 140 tentacles 

 in four rows. The largest of simple Eui'opean corals. 

 Described as British on authority of one specimen 

 dredged by Mr. MacAndrew, twenty-five miles oS* East 

 Shetland, in ninety fathoms. It appears to be common 

 at the North Cape, Norway, at a depth of 150—200 

 fathoms. 



FAMILY II. OCULINIDiE. 



Corallum solid, branching. 



Genus Lophohelia, M. Edw. and Haime. 

 Corallum tree-like, walls very thick, scarcely ribbed. 



No columella ov palules. 



1, L. PROLiFERA, Linn. "The Tuft Coral." 



Madrepora prolifera (Linn., E. and S., Esper.),ljitho- 

 dendron proliferum (Schweigger), Oculina prolifera {M. 

 E. andH.). 



Hab. : Skye, Rum, Orkney. Height of colony up 

 to 10 in. 



This is the only branching coral found in Britain. 

 The animal is unknown. It forms a "massive, compact, 

 many-branched tree, rising from a slender base." 



