Calothri*.] ALGiE CONFERVOIDE/E. - 367 



solved into lenticular fporccfra. — Name, xetkog, beautiful, Ogi%, zhair: 

 the filaments being very slender and delicate. — Scarcely to be 

 distinguished from Scytonema, but by the green colour and more 

 membranous texture of the filaments. 



* Confervicolse : parasitical, minutely fasciculate. 



1. C. confervicola, Ag. (glaucous parasitical Calothrix); fila- 

 ments minute glaucous erect subulate rigid fasciculate. — Ag. 

 Sijst. Alg. p. 70. — Conferva confervicola, Dillio. Coif. t. 8, and 

 Suppl. t. A. E. Bot. t. 2576. 



On marine filamentous Algce, very common. — Filaments 1 — 2 lines 

 high, rigid, forming scattered or continuous tufts. " Internal mass at 

 length consolidated into lenticular sporidia, which escape at the end of 

 the tube, either singly or cohering in short cylinders." Carm. MSS. 

 cum Ic. 



2. C. Berheleydna, Carm. (Mr. Berkeley s Calothrix); filaments 

 minute bright grass-green flaccid flexuose fasciculate. 



In fresh-water, adhering to aquatic plants. Oban, Rev. M. J. Berkeley. 

 — " Tufts scattered, about a line in diameter, of a vivid green colour '.fila- 

 ments 20 — 30 in each tuft, radiating horizontally from a central point, 

 exceedingly slender, flaccid, tapering to a hyaline point, variously curved 

 or flexuose. It comes very near C confervicola ; but the filaments 

 are much shorter and more slender, and possess nothing of the rigid 

 erect habit of that species." Carm. MSS. cum Ic. 



3. C. Mucor, Ag. (transparent parasitical Calot/irix); " fila- 

 ments hyaline rigid straightish erect, forming olivaceous-green 

 fascicles." Ag. Syst. Alg. p. 70. 



On marine Alga?, at Brighton, Mr. Borrer. 



4. C. luteola, Grev. (opaque parasitical Calothrix); "filaments 

 hyaline yellowish exceedingly slender elongated flexible scat- 

 tered." Grev. Crypt. 11. t. 299. 



On marine filiform Algai % nre; Appin, Captain CermickaeL — "Plant of 

 a pale yellowish colour, investing the stems of the filiform Alga with its 

 numerous filaments and i/ivim: them a most delicate feathery appear- 

 ance." Grev. — Captain Carmichael thus describes the plant in his 

 MSS. " Filaments in small tufts, a Hoe or twd in length, exceedingly 

 slender, tortuous, tapering, of a snow-white colour and so Opaque as to 

 appear intensely black when viewed against the light. Most of them 

 arc variegated with pellucid fasciae, caused by the destruction or escape 



of the colouring matter. In the water, this minute parasite givei a 



downi appearance to the plants on winch it grows." Carm, MSS. 



."). ('. nfoeo, Ag. i white Calothru ),• filamenta e xc e e d ing ly slen- 

 der rigid white forming dirty yellow continuous tufts*- I 

 Syst. Ah/. j>. 7<). — Conferva mvea, Ihllw. ('"if. t. ('.-/.'. !>••(. 

 /."l'.-.l".*.' 



U) sulphur springs. Yorkshire and Durham, Dr. Witian. Near Dar- 

 lington, Mr. jr. />'>ir/j,(>u.u:—" Dr. Willan asesrea us that this apedea 



i- found below the ipiing, no further than BJ the water retains sensible 



