328 niOTOCOCCE^. 



Palmella qranosa Berk., Glean. Brit. Alg. ii. p. 19. Mi- 

 crocystis granosa MeneghinI, 1. c. p. 85. 



Hab. Growing in great abundance on sub-immersed 

 Hyjinum stellatum, in the bogs bordering on Whittlesea 

 Mere, summer : Rev. 31. J. Berkeley. Aberdeen : 

 Dr. Dickie. Broadwater Forest : 3Ir. Jenner. 



" Pale green, or when preserved in the herbarium, with a 

 pale brownish tint. Growing in large masses of no certain or 

 distinct form, but broken into many angular faces, having a 

 very granulated appearance, and crumbling beneath the fin- 

 gers. The whole plant is made up of sub-elliptic, hyaline, 

 colourless, jelly-like bags, containing from two to four green 

 elliptical granules, which in some lights appear as if sur- 

 rounded with a pellucid border." — Berk. 



Meneghini makes the following remarks on this fine spe- 

 cies : " Hie auctor monet speciem hanc pr?ster colorem Hcr- 

 matococco sanguineo Ag. simillimam esse ; et ejusdem affini- 

 tate cum Palmella rupestris animadvertens limites generum 

 Htematococcus et Palmella incertos esse demonstrat, summo 

 nempe acumine novi generis Microcystis instituendi necessi- 

 tatem preesenserat." 



b. Usually hut one investing membrane or vesicle. 



* Granules jTrom one to eight. 



8. H^MATOCOCCUS ALPESTRIS Hass. 



Plate LXXXI. Fig. 3. 



Char. Globules of very variable size, often large, rarely 

 concentric, containing one, two, four, or eight, but usually 

 two or four small, spherical, dark green granules. 



Pleurococcus glomeratus ? Menegh., loc. cit. t. v. f. 2. 



Hab. Wales : Sir W. J. Hooker. 



On looking over the splendid collection of Algce forming 

 part of the herbarium of Sir W. J. Hooker, I noticed a 



