76 R. Gronblad, New Desmids. 



Fig. 24 — 26 S. bicorne Hauptfl. var. quadrifidum, nova var. ) 



530 

 1 



„ 27 Desmidium baileyi var. caelatum (Kirchn.) Nordst. 



1460 



1 

 28 — 29 5. tetracerum (?) var. subexcavatum nova var. 



530 



i 

 „ 30 .S". uhtuense, nova spec. circ. ' 00 \ 



„ 31 — 32 S. tetracerum var. biverruciferum, nova var. U6 °, 



„ 33 — 34 S. polymorphum var. pygmaeum nova var. l460 /i 



„ 35 — 35' S. johnsonii var. perpendiculatum. Fig". 35 is a sche- 



" matic sketch of the chloroplasts from the vertical view. 35 



530 



„ 36 — 37 S. pseudoiotanum, nova sp. 1460 { 

 „ 38 — 41 Closterium tumidum var. nylandieum nova var. 38 — 39 

 two zygospores, 40 side view of zygospore, 41 vegetative 

 cell. X 530 ;, 

 „ 42 CI. pseudolunula Borge f. 530 x 

 „ 43 CI. spetsbergense var. laticeps nova var. X ° 30 i 

 „ 44 Zygospore of CI. rostratum (abnormal.). X >30 i 

 „ 45 Staur. dimazum (Liitkem.) Gronbl. Vertical view with 



chloroplasts. < ° 30 x 

 „ 46 S. natator var. boldtii Gronbl. Vertical view with chloro- 

 plasts. X 53 ° , 



Plate VI. 



Fig. 1 Hyalotheca neglecta Racib. 



1460 



i 



2 — 4 Gymnozyga confervocea West. 2 14,;o , ; 3 and 4 



showing the cell division. < 890 , 

 5—6 Spondylosiurn pulchellum Arch., type. ] 14tl ° , 

 7 — 8 — var. bambusinoides (Wittr.) Lund. 14fi " , 



9 Hyaloth. dissiliens var. hians Wolle s '"' , 



10 H. undulata Nordst. Forma 14,;o , 



1 1 H. indica var. fennica, nova var. 1460 t 



12 — 13 Cosmarium cedercreutzii. nova spec. l460 , 



14—15 C. calamistratum, nova spec. < 1460 



i 

 16 — 17 C. blyttii var. pseudorichmondiae . nova var. 1460 /i 



i 



IS— 19 C. abscissum nova spec. 



