Conferva.] ALGJS C0NFERV01DEJK. 351 



fine forming a cloudy floating yellow-green stratum, articula- 

 tions 3 — 5 times longer than broad. — Ag. Syst. Alg. p. 88. — C. 

 sordida, Dillw. Conf. t. 60. 



In stagnant waters, about the stems of aquatic plants, common. 



5. C. floccosa, Ag. (floccose Conferva); filaments very 

 slender forming pale-green floating strata, articulations once or 

 twice as long as broad. — Ag. Syst. Alg. p. 89. — C. fugaeissima, 

 Dillw. Conf. Suppl. t. B. 



In ditches and pools; very nearly allied to C. bombycina, but " much 

 more robust, fine as it is ; besides the great disparity of the articulations.'* 

 Grev. I have frequently found the two growing together. 



6. C. zondta, "Webr. et Mohr, Ag. (banded Conferva); fila- 

 ments unequal forming bright-green lubricous masses, articula- 

 tions rather longer than broad marked in the centre with a 

 full-green band. — Ag. Syst. Alg. p. 90. Dillw. Conf. Syn.p. 41, 

 and C. lubrica, t. 47. 



On stones, in rivulets. 



7. C. vesicdta, Ag. (inflated Conferva); filaments very 

 slender forming dull-green strata, articulations variable in 

 length 2 — 5 times longer than broad, here and there inflated. — 

 C. vesicata, tumidula, Candollii and Borisii, Ag. Syst. Alg. 



pp, 93 — 94. — C. alternata, Dillw. Conf. Syn. t. B. — C tumidula, 

 E. Bot. t. 1670. 



In stagnant water, common. — In uniting the above four species of 

 Agardh, I gladly follow Capt. Carmichael, who remarks, that " in a 

 genus so notoriously variable in the length of the articulations, the 

 differences indicated in the definitions will hardly entitle them to rank 

 even as varieties." 



8. C. rividdris, Linn. (River Conferva); filaments slender 

 very long straight bright-green silky forming tufted bundles, 

 articulations 2 — 4 times longer than broad. — Ag. Syst. Alg. 

 p. 95. B. Bot. t. 1654. Dillw. Conf. t. 39. 



In streams and rivers, common. — 2—3 feet long, tutted. I have 

 never seen the joints so short as represented by Dillw vn ; but his 

 figure is, En other respects, characteristic. 



9. C. mucosa, Mert (mucous Conferva); filaments formings 

 floating bright-green stratum extremely gelatinous invested 

 with definite mucus, articulations about as Long as broad — 

 DiUw. Conf. Syn. i. />'. (bad.) Ag. Syst. Alg. p. 90. 



In stagnant water, rare. Bantry, Mi i Hutch is. Appin, Capt. Car* 

 michael.—** Filaments about the thickness of those of Cdissitieus, cylindri- 

 cal, by no means fragile, surrounded bj ■ mucous envelope, twice their 

 own diameter. Articulations about as broad ss long* Svorular mass Bome* 

 times filling the whole joint, sometimes about two-thuds. In the latter 



.-. the contrast between the opaque and transparent parts of the Joint, 



-. the filament a remarkably beautiful appearance. In drying, it dis- 

 charges a profusion of large granules, and becomes slightly contracted 



