58 
Algae of Tasmania. 
formibus, superioribus linearibus elongatis; axillis rotundatis ; 
pinnulis obtuse dentatis; apicibus obtusis. 
George Town, V. D. L., R. Gunn, Esq., n. 1277.—Having 
seen but a solitary barren specimen of this remarkable plant, I am 
unable to give more than a very imperfect description of it, and 
cannot altogether satisfy myself of the proper genus to which it 
should be referred. It has so much the colour and outline of very 
luxuriant specimens of Laurencia pinnatifida, that I venture to 
place it in the same genus, although its substance is as thin and 
membranous as the frond of Rhodomenia bifida, or of Thamno- 
phora Mertensii. Had the apices been acute, and the colour less 
purple, I should probably have placed it in Thamnophora. The 
fruit, when discovered, will decide the question. Mr. Gunn’s 
specimen, which is broken at base, and may be only a branch, 
measures 8 inches in length, and, taking the expansion of its 
branches, 7 inches across ; the breadth of the frond being half an 
inch in the widest, and more than a quarter in the narrowest 
place. There is neither midrib nor thickening in the middle, the 
whole is a thin membrane. The stem is undivided; its lower 
half furnished with short, closely-set, alternate, bluntly-toothed 
pinnae about half an inch long; its upper half bears long pinnae 
3 inches long, which are again pinnatifid, the pinnules bluntly 
toothed, and the teeth themselves bluntly cleft at the apex. All the 
apices and axils are blunt. Colour a pale purplish red, greenish 
in the lower part, exactly resembling that of L. pinnatifida. 
18. Laurencia tenuissima, Grev. (Fucus tenuissiraus, Turn, 
t. 100.) 
George Town, V. D. L., R. Gunn, Esq., n. 1296, 1319—and 
part of 1288 (specimens in decay). 
19. Laurencia dasyphylla, Grev. (Fucus dasyphyllus, Turn. t. 22.) 
George Town, V. D. L., R. Gunn, Esq., n. 1281.—Colour 
much darker than usual, deep purple. 
20. Laurencia obtusa, Lamour. (Fucus obtusus, Turn. t. 21.) 
George Town, V. D. L., R. Gunn, Esq., n. 1288, in part. 
21. Laurencia botryoides, Gaill. (Fucus botryoides, Turn. 1. 178.) 
George Town, V. D. L., R. Gunn, Esq., n. 1286. 
