/ 



,1 



224 MONOCYSTE^. 



Hah. High Beech : A. H. H. Penzance : Mr. Ralfs. 

 Bogs at Fisher's Castle : Mr. Jenner. 



This very beautiful species is by no means common. It 

 inhabits generally ponds on commons and other exposed situ- 



~ lX^'',ations. 





i«. 8. Lyngbya vermicularis Hass, 



^ .: >^' 



■^./^^ Plate LX. Fig. 5. 



Char. Filaments very mucous, tenacious, and of a yellowish 

 green colour, finer than those of the preceding species. 

 Cells twice or thrice as long as broad. Endochrome 

 ^ rarely filling the cavity of the cell. 



-^"^^ Hah. High Beech : A. H. H Penzance : Mr. Ralfs. 

  ^j^ Sussex : Mr. Jenner. 



:^ ^ *^ A common species in boggy pools. 



^^-"^ 9. Lyngbya prolifica Grev. 



Plate VIII. Fig. 4. 



Char. Filaments exceedingly slender, entangled, -purple, very 

 broadly effused, fioating. 



Grev. Crypt. Fl. t. 303. ; Harv. 1. c. p. 370. ; also in Manual, 

 p. 160. 



Hah. In the loch of Haining, Selkirkshire, October to 

 April: T>r. Greville. 



" Plant extensively diffused, forming a floating stratum, 

 of a rich purple colour. Filaments extremely slender, en- 

 tangled, somewhat rigid, yet flexible, entirely destitute of 

 attachment, and free from any mucous layer. Annuli from 

 the minuteness of the filament almost inconspicuous." — G?'ev, 



Note. — The following marine Algce I regard as members of the genus 

 Cladophora, — C. pellucida, C.rectangularis^ C. Hutchinsice, C. diffusa^ C. 

 nuda^ C. rupestris, C. Icetevirens^ C Jlexuosa, C. gi^acilis^ C. refracta^ C. 

 albida, C. lanosa, C. uiicialis, C. glaucescens, C. a?'cta, C aruginosa, and 

 C riparia; while in Aplhnema I place the subjoined ConfervcB^ — arenicola^ 

 sutoria^ Linum^ c?'assa^ implexa^ iilothrix, are?iosa, melargoniwn^ cei^ea^ col- 

 labejiSy bangio'ideSy Youngana^ and clandestina. 



