378 ALGili CONFEIlVOIDEiE. [Belonia. 



" On rocks, by the sea-side, where birds are in the habit of resting ;" 

 Appin, Captain Carmichael.—" it spreads over the dry naked earth. 

 Stratum several feet in extent, firm, coriaceous, of a glossy black colour, 

 void of lubricity. Filaments about half a line in length, twisted like a 

 cork-screw, radiating in all directions." Carm. MSS. 



23. O. spadicea, Carm. (chestnut-coloured Oseillatoria'); stra- 

 tum dark chestnut-colour very thin spreading, filaments yellow- 

 ish-brown thick variously curved and twisted, stria? conspicuous 

 and very close. 



On damp mossy earth ; " rare." Appin, Captain Carmichael. — " It 

 occurs as a very thin dark-brown stratum, spreading to the extent of 

 several feet, and is hardly to be distinguished from the mossy earth on 

 which it grows. Filaments short, straight, curved, or spirally twisted, 

 radiating in every direction and possessed of all the movements peculiar 

 to the tribe." Carm. MSS. — A very distinct species. -The filaments 

 strongly resemble those of a Srytonema, in which genus i should not 

 hesitate placing it, had not Carmichael observed its oscillating charac- 

 ter. 



24. O. ochrdcea, Grev. (fragile Oseillatoria); forming floating 

 cloud-like very fragile masses of an ochrey colour, filaments 

 scattered very slender acicular. Grev. Ft. Edin. p. 304. — 

 Conferva ochracea, Dilliv. Conf t. 62. 



In boggy pools, common. — This species occurs in cloud-like masses, 

 scarcely to be called strata; the filaments are very slender, and scattered 

 without order. Dillwyn's figure and description incorrectly represent 

 them as branched; and Lyngbye's (if indeed his be the same species) as 

 thick and strongly striated, /igardh considers it to be some other spe- 

 cies in decay. 



25. O. ? aldta, Carm. (winged Oseillatoria); stratum subge- 

 latinous chestnut-brown, filaments curved bordered by a broad 

 waved membranaceous marginal expansion. Grev. Crypt. Fl. 

 t. 222. 



On wet, calcareous cliffs. Appin, Captain Carmichael. — " Stratum of 

 indeterminate extent, thin, rather gelatinous, of a chestnut colour. Fi- 

 laments about half a line in length, simple or sometimes cohering later- 

 ally, variously curved, and edged on each side with a membranous ex- 

 pansion thrice their own diameter. No oscillation or radiation (?)• 

 The bordering membrane is so very singular a character, that it is with 

 some diffidence 1 admit this production to a place among the J/gce. In 

 the mean time, until future observations enable us to judge of its real 

 nature, it will rank with most propriety in a genus, all the members of 

 which are equally doubtful." Carm. MSS. 



77. Belonia. Carm. Belonia. 



Filaments minute, acicular, heaped together, submoniliform, 

 finally dissolving into elliptic sporidia. — Name ; /SsXowj, a needle, 

 from the acicular filaments. — Differing from Oseillatoria in the 

 absence of a gelatinous substratum, and from Lyngbya in the 

 nature of the filaments. 



