258 NEMATOGENZ, 
Lyngbya estuarii. Lieb. Danska Algflora. (1839.) 
Trichomes rigid, flexuously curved, blue green, granular, 
densely interwoven in dark blue green tufis; joints 3-6 times 
shorter than their diameter; scarcely constricted; sheaths 
pellucid, hyaline, becoming brownish, at first scarcely lamellose, 
at length when old becoming distinctly lamellose. 
Size. Trichomes ‘025--03 mm. diam., without sheath. 
Lyngbya eruginosa, Ag. Syst. p, 74. Rabh. Alg. Eur. ii., 
38. * 
Lyngbya 3. ferruginea, Harv. Phyc. Britt., t. 311. 
Lyngbya curvata, Rabh. Alg. Eur. ii., 137. 
Lyngbya majuscula, Cocks Brit. Seaweeds No. 365. 
In brackish water. 
Plate CI. fig. 1. a, portion of filament X 160 diam. 4, extremity 
of filament, with portion of trichome escaped X 160 diam. , portion of 
filament with the trichome divided into hormogones x 330. @, e, hormo- 
gones X 330, all after Thuret. 
Lyngbya littoralis. (Carm). 
Stratum thin, submembranaceous, mucilaginous, blue green, 
shortly radiating ; trichomes rigid, flexuous, vividly oscillating, 
equal; joints 4-5 times as broad as long, constricted at their 
junction and hyaline, dissepiments granulated, extreme apiculus 
straight, broadly rounded, paler; cell contents pale blue green, 
very delicately granular. 
Size. Threads -013--015 mm. diam. 
Oscillatoria littoralis, Carm. Alg. App.; Eng. Fl, y., 375. 
Harv. Man., 165. Harv. Phyc. Britt. t. 105, fig. a. 
In brackish water, and in rock pools by the shore. 
“ Stratum exceedingly thin, slimy, bullated by the extrication of air- 
bubbles, of a dark green colour, spreading to an indefinite extent over 
the muddy bottom of the pool.’”’—Carm. 
Plate CII. fig.1. Portions of trichomes X 400, from the original 
specimens. 
Lyngbya ochracea. Thur. Ann. Sci. Nat. (1875) 377. 
Forming cloud-like floating fragile masses of an ochrey 
colour. Trichomes very slender, scattered; joints scarcely 
visible. 
Sizz, Trichomes -002 mm. diam., including sheath. 
Kirch. Alg. Schl. 241. 
Leptothrix ochracea, Kutz. Tab. Phyc. i., t. 61, fig. 1. 
Conferva ochracea, Dillw. Conf. t. 62. 
