more attention than it has yet obtamed. ‘The present species 
I believe to be common to many parts of the British coast ; but 
is, perhaps, often confounded with Conferva tortuosa, which it 
much resembles in habit and general aspect. 
A. Fig. 1. LyNeGBYA CARMICHAELII, growing on Fucus vesiculosus:—of the 
natural size. 2. Portion of a ripe filament. 3. A sporidium :—4dolh mag- 
nified. 
Puate CLXXXVI. #. 
LYNGBYA SPECIOSA, Carm. 
Lynasya speciosa; filaments long, thick, flaccid, straight, at length curled, 
the margin crenate, forming bright yellow-green strata, glossy when 
dry ; tube imperfectly jointed. 
Lynaya speciosa, Carm. Alg. Appin. ined. Harv. in Hook. Br. Fl. vol. ii. 
p- 371. Harv. Man. p.161. Wyatt, Alg. Danm. no. 196. 
Has. On marine rocks, between tide-marks, and on Fuc?. Annual. Sum- 
mer. Appin, Capt. Carmichael. Paington, Torbay, Mrs. Griffiths. 
St. Michael’s Mount, Wr. Ra//s. 
Gnoar. Distr. 
Descr. This species, like Z. Carmichaelii, forms widely spreading strata of a 
vivid green colour, covering the surface of rocks and Fuci with a fleeey coat, 
till lifted by the returning tide. The diameter of the filament is nearly 
twice as great as in L. Carmichaeli, the colour is greatly brighter, and the 
substance more gelatinous and glossy. In other respects the plants closely 
resemble each other. Filaments at first straight, three or four inches long, 
flaccid, at length becoming curled and crenate. Hndochrome at first nearly 
filling the tube, gradually contracting as it solidifies, and at length formed 
into a lenticular sporidium, which, when ripe, bursts through the walls of 
the tube,leaving the filaraents perfectly colourless. A more or less evident 
division into cells is observable. 
PRR ees 
This very pretty species is nearly related to the preceding, 
from which it is chiefly distinguished by the larger size, brighter 
colour, and more lubricous substance. It adheres far more 
closely to paper in drying, and does not so perfectly recover its 
form after having once been dried. 
B. Fig. 1. Tuft of Lyna@sBya speciosa, on a rock :—of the natural size. 2. 
Portion of mature filaments. 3. A sporidium :—all highly magnified. 
