Chroolepus.] ALG/E CONFERVOl DEiE. 381 



lationsaslong as broad. — Ag. Syst.Atg. p. 35. — Conferva odorata, 

 Lyngb. Hydroph. Dan. t. 57. — Amphiconium Linnai, Spr. — - 

 Johnst. Benv. Fl. v. 2. p. 245. 



On the bark of ash-trees. About Berwick, Dr. Johnston. — I cannot 

 distinguish this from the following. 



4. C. lichenicolus, Ag. (parasitical Chroolepus); tufts red- 

 orange, filaments erect fasciculated alternately branched rigid, 

 articulations slightly tumid as long as broad. — Ag. Syst, Alg. 

 p. 35.— Co?if. lic/ienicola, E. Bot. t. 1609. Dillw. Syn. Conf. p. 56. 



On Lichens and old trees, not uncommon. 



2. Black, torulose ; bearing clavate bodies resembling sporidia. 

 (Helmisporium?) 



5. C. ebenea, Ag. (black Chroolepus) ; filaments branched erect 

 tufted rigid subcartilaginous black obtuse, articulations as long 

 as broad. Ag. Syst. Alg. p. 36. — Conferva ehenea, Dillw. Conf. 

 t. 101 Byssus nigra, E.Bot.t. 702. 



On rocks and trees, in alpine districts. — " Stratum of indefinite extent, 

 thin, velvetty-hlack. Filaments scarcely more than a line (or two) in 

 length, interwoven, slightly branched, extremely fragile. Articulations 

 about as broad as long, rather translucent. I have found specimens of 

 this plant, bearing pod-shaped branches or appendages, thicker than the 

 main filament, with the articulations twice as broad as long, and readily 

 separating into single joints." Carm. MSS.— These pod-shaped appen- 

 dages are surely of the same nature as what are called " sporidia" in the 

 genus Helmisporium of Link; to which genus, the black species of 

 Chroolepus ought, perhaps, to be removed. 



6. C. melcenus, Carm. (long-jointed black Chroolepus) ; fila- 

 ments slightly branched erect forming a jet-black stratum, arti- 

 culations oval twice as long as broad, joints < outi -acted.— S////- 

 collcsin f mrhena, Ag. Syst. Alg. p. H.— Conf rru mchena, Lyngb. 

 Hydroph. Dan. t. .">7. 



On old beech-trees at Appiu, Cap/. Carmichael. — " Stratum of several 

 inches in diameter, of a deep velvettv -black colour. Filaments about a 

 line in length, slightly branched, exceedingly fragile; articulations about 

 twice as long'es broad, oval, inonilitbnu, BubdUpfeanous." Cam. MSS, 

 — Lyngbye'fl figure* though cude,iBYer) characterise. I do not tee 

 how" this differs Irani Monilia alUntwta, {Gr*v. Crypt, 77./. 865) except 

 in being branched; the structure is precise!} similar. 

 • 7. (!. me*6meku, ('arm. (pariegaifid Chroolepus)s •• filaments 

 liighth branched ereel forming a jet-black stratum, articula- 

 tions globose opaque, the uppermost pellucid.*' Carm, J/.s'.v. 



On decaying sterna of Urlica dioicu, Captain Carmichael. — " Stratum 

 half an inch in length, of a deep black colour. Filaments erect, slightly 

 branched j branches divaricate, at the base, ascending. Articulations 

 globular, monilifbrm, perfectly opaque, with the exception of one or two 



Of* the tenninal one-. Mlii]ua'tonn ;ipp« Idagea -cattcn •', M io I 



Carm MSS, 



B. c. Amditii, Hook. ^ Mr. Am-tr* Ckrookp**)i BkmenH 



