Conferva.] ALU/E CHLOUOSPERMEJi. 225 



slender, forming dull-green strata; articulations variable in 

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

 Harv. in Hook. Br. FL v. ii. p. 351. C. alternate Dillw. 

 Sup. t. B. C. tumidula, E. Bot. t. 1670. 



In stagnant water. 



7. C. rivularis, Linn. River Conferva. Filaments slender, 

 very long, straight, bright-green, silky, forming tufted bundles; 

 articulations 2 4 times longer than broad. E. Bot. t. 1654. 

 Dillw. t. 39. Harv. in Hook. Br. FL v. ii. p. 351. 



In streams and rivers, common. 



8. C. mucosa, Mert. Mucous Conferva. Filaments forming 

 a floating bright-green stratum, extremely gelatinous, invested 

 with definite mucus; articulations about as long as broad. 

 Dillw. Conf. Suppl t. B. Harv. in Hook. Br. FL v. ii. p. 351. 



In stagnant water, rare. Bantry ; Miss Hutchins. 



9. C. dissiliens, Dilhv. Fragile Conferva. Filaments elong- 

 ated, straight, very fragile, slimy and gelatinous, forming bright 

 green floating masses ; articulations half as long as broad. 

 Dillw. Conf. t. 63. Harv. in Hook. Br. FL v. ii. p. 352. 



In streams and ditches. Glendine-wood ; Miss Ball. I am not 

 well acquainted with this plant ; may it not prove a true Desmidium ? 



10. C. capillaris, Linn. Capillary Conferva. Filaments 

 pale-green, void of lubricity, much curled and interwoven into 

 subrigid, extensive strata; articulations 3 4 times longer than 

 broad. E. Bot. t. 2364. Harv. in Hook. Br. FL v. ii. p. 352. 

 C. crispa, Dillw. Suppl. t. B. 



In streams and rivulets, not rare. 



c. Filaments forming crisped, entangled strata, green. Inhabit 

 the sea or salt water ditches. 



11. C. Linum, Roth. Flax-like Conferva. Filaments thick, 

 rigid, crisped, forming loose extensive bundles of a dull green 

 colour; articulations once and half as long as broad. Ag. Syst. 

 p. 97. Harv. in Hook. Br. FL v. ii. p. 352. 



In salt water ditches, along the muddy sea-shorp, or in the sea. At 

 Wicklow ; W. H. Harvey. Portstewart ; Mr. D. Moore. 



12. C. crassa, Ag. Thick Conferva. Filaments very thick, 

 of great length, deep glossy-green, much crisped, rigid, forming 

 loosely entangled harsh masses ; articulations as long as broad. 

 Conf. capillaris, Dilhv. t. 9. C. crassa, Ag. Harv. in Hook. 

 Br. FL v. n.p. 352. 



In salt water ditches. Abundant in ditches by the North Wall, 

 Dublin. 



13. C. tortuosa, Dillw. Twisted Conferva. Filaments rigid, 



2 E 



