Plate XLVIII. 



Fig. 216. HALYMENIA LIGULATA. 



Colour. In the three chief varieties, as follows; dicliotoma^ a clear pinky redj 

 ramentacea^ paler; latifolia^ dark red. 



Substance. Membranaceous and gelatinous. Ramentacea, very thin. 



Character of Frond. So variable that the varieties are classed into three sorts, as 

 follows: — 1. Dicliotoma; compressed, narrow; often, though irregularly forked; 

 the divisions of nearly equal width; tapering to both extremities. 2. Bamentacea; 

 compressed or nearly cylindrical; full of gelantine; divided into three or four 

 principal portions (lohes)] tapering to both ends. 3. Latifolia; flat; wedge- 

 shaped; either simple or forked; or cleft into finger-like portions (lohes). All 

 three sorts have their margins more or less fringed with frondlets; latifolia 

 least. Root a disc. 



Measurement. Dicliotoma from 6 to 8 inches long; ramentacea from 12 to 14 long 



and from J to an inch in width; latifolia from 12 to 20 inches long, and 



from 2 to 4 wide in the widest part. 

 Fructification. Only one kind know^n. Minute masses of spores, immersed in, and 



scattered profusely about the surface, as if it had been dusted with grains of 



Cayenne pepper. 



Hahitat. Southern shores of England. On rocks near low-water mark. Rare. 



Variable as this plant is in growth, its "pinky colour, peculiarly soft substance, 

 between gelantinous and membranaceous, and the innumerable dots of fructifi- 

 cation, are found in every specimen and sufiiciently mark the species." Hahvet. 



Fig. 217. NEMALEON PUEPUEEUM. 



Colour. A fine purple red which is given out in fresh water. 

 Substance. Tender and gelatinous; slippery to the touch. 



Character of Frond. Long, cylindrical stems and branches. Stem as thick as a 

 goose-quiil; properly tapering to both ends, but the tip sometimes broken, and 

 throwing out several lesser shoots; set with long, wide-spread, wavy, worm-like 

 branches. Branches simple or furnished with a second set, of much reduced 

 size; all tapering when not broken. A few slender branchlets scattered irreg- 

 ularly over stem and branches. Root a disc. 



Measurement. From J a foot to 2 J feet long. 



Fructification. Only one kind known. Roundish masses of spores sunk among the 



filaments which form the outer layer of the frond. 

 Sabitat. South of England and west of Ireland. In sandy places among Zostra^ 



near low- water mark. Rare. 



Now Helmintlwcladia purpurea. 



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