274 NATUEAL HISTORY OF 



and grows often to a large size. Dr. Johnston describes 

 it as occasionally reaching a height of 3 or 4 inches, and 

 being 12 — 20 in diameter; but Mr. Couch states that 

 this is small compared with many specimens procured 

 on the Cornish coast. He mentions one specimen 

 which he had seen, which measui-ed 7 ft. 4 in. in 

 circumference, and If ft. in depth. This was obtained 

 near Eddystone Lighthouse. This zoophyte grows in 

 large foliaceous masses, " resembling a piece of paper 

 in various folds which unite so as to form cavernous 

 passages through the mass.'' The zooecia are arranged 

 on both sides of the folds back to back as in F.foliacea. 

 They are usually recognizable only as round openings 

 quincuncially arranged. In their young stage they 

 are punctured, the punctures becoming deeper and 

 more furrowed with age. When living the zoarium is 

 flesh-coloured; but the colour changes to brown on 

 removal from the water. It is sometimes found as an 

 incrusting species, in which case the cells are, of course, 

 unilateral. 



4. L. ADPRESSA, Bush. Plate XXI. fig. 7. 

 L. lata {Bush, Manzoni) . 



Hab. : Torbay {T.E.), Guernsey {A.M.N.) , Hastings 

 {Miss Jelly). 



The cells are oval, indistinctly dotted. The orifice 

 is long, with a straight lower margin and oval above ; 

 on each side of the orifice, just above the lower margin, 

 there is a distinct contraction. The margin of the 

 orifice is thickened, and on each side of it is occa- 

 sionally a knob or boss. 



The colonies are chiefly found incrusting shells o£ 

 univalves. 



5. L. PEETUSA, Usper. 



