SPECIES OF ALG^. 



39 



b. 

 c. 

 c. 



d. 

 d. 

 d. 

 e. 

 e. 



/■ 

 f. 

 g- 

 g- 

 h. 



i. 



i. 



J- 



J- 



k. 



k. 



I. 



I. 



m. 



tn. 



m. 



n. 



n. 



o. 



o. 



P- 



P- 



§■ 

 r. 

 r. 

 s. 



s. 



t. 

 t. 



u. 

 u. 



Pore above the middle ic). 

 Oospore not quite filling the oogonium (d). 

 Oospore entirely filling the oogonium (e). 

 Veg. cells 3-5 times as long as wide . . 



2-5-3-5 

 4-10 



a u u 



Veg. cells 4-5 times as long as wide 



2-4 



obsoletum, 71 



pliisiospermum, 7 2 



polymorphum, 73 



fragile, 71 



zig-zag, 71 



Oospores subglobose, filling the oogonia . . . autumnale, 73 

 Oospores obovate, not entirely filling the oogonia (^). 



Veg. cells 4-6 times as long as wide . . . vernale, 72 



Veg. cells 2-4 " " " " " _ crispum, 72 

 Oogonia single, opening by a superior pore; oospore globose not 



filling the oogonium ... . urbicum, 73 

 Oogonia opening by a pore above the middle (7). 



Oogonia " " " lid . gracillimum, 74 



Veg. cells 3-7 times as long as wide . paludosuin, 74 



" " 2-5 " " a II u _ crassum, 74 



Oogonia with 7-12 vertical constrictions 

 Oogonia without vertical constrictions (/). 

 Oospore globose or nearly so (in). 



" subellipsoid [o). 

 Diameter veg. cells 15-1 7/<, 4 times constricted 

 " " " 28-38yu, not constricted 



" " " from 9-15// («). 



oospore depressed-globose 



" exactly globose . . 



Dwarf males adhering to all parts of the female 



" " on or near the oogonia 



Oospore membrane smooth (^). 



" " beset with bristles (cc). 



Oospores globose or nearly so (f). 



" ellipsoid or ovate (w). 

 Oogonia opening by a lid.(j-). 



" a pore (i). 

 Terminal cell rounded 



" " apiculate . . 



Pore in the middle or a little above (u). 



" above the middle (v). 

 Veg. cells 4.5-6 times as long as broad 



(( it 2— A " " " '' " 



platygynum, 75 



undulaium, 76 

 cataractum, 77 



Hens, 75 



Areschougii, 76 



multispora, 78 



cyathigerum, 77 



Lundense, 79 

 macrandrium, 80 



flavescens, 78 

 Braunii, 79 



