Fresh-water Alg^e, dc. By A. W. Bennett. 3 



made especially from bog and moor pools, wet rocks, and the 

 smaller streams. None were taken from the larger streams or 

 lakes.* 



PEOTOPHYTA. 



Palmellace^s:. 



Eremosphaera viridis dBy. 

 Gloeocystis vesiculosa Nag. 



„ rupestris Eabh. 



„ botryoides ? Ktz. 



Schizochlamys gelatinosa A. Br. 

 Palmella mucosa Ktz. 

 Botryococcus Braunii Ktz. 



"What may possibly prove to be a second species of this genus 

 was frequently met with in bog pools. Each colony was about 

 40 fx in diameter, composed as a rule of thirty-two cells, with no 

 evident investing gelatinous envelope, swimming with considerable 

 velocity and at the same time rotating in the water, without any 

 apparent motive power. The cells themselves were elliptical, and 

 filled with a hght green endochrome. 



Ehaphidium falcatum Cooke (B. pohjmorphum var. c fal- 



catum Eabh.). 

 Nephrocytium Agardhianum Nag. 



„ Nagelii Griin. 



Ophiocytium cochleare A. Br. 



I take this to be identical with 0. majus Nag. ; but is the 

 genus rightly placed under vegetable organisms at all ? 



Scenedesmus acutus Mey. 



„ quadricauda Breb. 



Protococcace^. 



Protococcus viridis Ag. 

 Chlorococcum gigas Griin. 

 Chlamydococcus pluvialis? A. Br. 



Chroococcaoe.s:. 



Chroococcus turgidus Nag. Wetherlam, Lancashire. 

 Aphanocapsa virescens Eabh. 



Forming jelly-like masses on a moist rock along with Nosfoc 

 humifnsum. 



* The names of new species are printed in small capitals; those of species 

 new to Britain in italics. 



B 2 



