Ser. CHLOROSPERMES. Fam. Oscillatoriee. 
Pruate CLXXXVI. Z. 
LYNGBYA CARMICHAELII, Za. 
Grn. Cuar. Pilaments destitute of a mucous layer, free, flexible, elongate, 
decumbent, not oscillating. Zude continuous; endochrome green or 
purple, densely annulated, and finally separating into lenticular spor7- 
dia. Lxnesya (4g.),—in honour of Hans Christian Lyngbye, author 
of an excellent work on the Alge of Denmark. 
Lynesya Carmichaelii ; filaments very long, thickish, curled, and tortuous, 
cylindrical, forming extensive, grass-green, closely entangled strata ; 
tube imperfectly jointed. 
Lynesya Carmichaelii, Harv. in Hook. Br. Fl. vol. i. p. 371. Harv. Man. 
p- 161. Wyatt, Alg. Danm. no. 230. 
Lynesya crispa, Carm. Alg. App. MS. (not of Ag.) 
Has. On marine rocks, between tide marks; also on Fuci, Zostera, 
floating timber, &e. Annual. Summer. Appin, Capt. Carmichael. 
Plymouth and Torbay, Mrs. Wyatt. Cornwall, Swansea, Anglesea, &c., 
Mr. Ralfs. Jersey, Miss White. Several places on the Inish coast. 
Groer. Distr. 
Descr. Forming very widely spreading, closely interwoven strata, often many 
yards in diameter, spreading continuously over rocks, and investing any 
plant, or other object, which may obstruct its progress, covering them with 
a shaggy coat of an intense grass green. i/aments several inches long, 
floating freely in water, flaccid, at first straight, or but slightly curved, 
afterwards becoming very much curled and interwoven together. The 
colouring matter in an early stage nearly fills the tube, being divided into 
short portions, by closely approaching transverse strie. As the season 
advances the endochrome gradually contracts, separating into distinct lenti- 
cular sporidia, a more or less perfect septum being visible between each. 
Finally, the sporidia burst through the tube, leaving it perfectly colourless. 
When dry, the filaments become a dull, dark green, without gloss: in this 
state they more or less adhere to paper. 
PDIP IISA LP ALR ALIA AAA ARAAAR RRS 
One of the many discoveries of the late Capt. Carmichael of 
Appin, whose name it bears. ‘The two species represented in 
this plate, while they are evidently closely allied to each other, 
differ in some degree from the true Lyzgby@, approaching nearer 
to Agardh’s genus Spheroplea. There is a more distinct cellular 
division in the tube than is typical of the genus with which they 
are associated, and, perhaps, at a future time they may be re- 
moved. But the whole group requires revision, and deserves 
