28 
Fig. 1. 
Fig. 2. 
Fig. 3. 
Fig. 4. 
Die, 5% 
Fig. 6. 
De 4 
Fig. 8. 
Bug. 9. 
Fig. 10. 
Fig. 11. 
Fig. 12. 
Fig. 13. 
V. B. WIITROCK, SKANDINAVIENS DESMIDIACÉER. 
EXPLICATIO RGus Reo i 
EUASTRUM VENUSTUM Bréb. 8 Magus n. var. — Cellula vegetativa a fronte 
visa (400 amplif.). 
MICRASTERIAS TRUNCATA Bréb. f BAHUSIENSIS n. var. — Cellula vegeta- 
tiva a fronte visa (200 amplif.). 
COSMARIUM UNDULATUM Corda y MINUTUM n. var. — Cellula vegetativa a 
fronte visa (400 amplif.). 
COSMARIUM CONSPERSUM Ralfs 8 ROTUNDATUM nm. var. — Cellula vegeta- 
tiva evacuata, a fronte visa (400 amplif.). 
Cosmarium TuwarrEsm Ralfs 8 magus Rabenh. — Cellula vegetativa a 
fronte visa (400 amplif.). 
ARTHRODESMUS Incus Hass.  INTERMEDIUS n. var. — a cellula vegetativa 
a fronte visa; a cellule vegetative evacuate, a fronte vise; 5 cellule 
vegetative evacuate a latere vise; c cellula vegetativa evacuata a ver- 
tice visa (omnes fig. 400 amplif.). 
STAURASTRUM BIDENTATUM nm. sp. a cellula vegetativa a fronte visa; 6 cel- 
lula vegetativa a vertice visa (utraque fig. 400 amplif.). 
STAURASTRUM PILOSUM Archer. — a cellula vegetativa a fronte visa; 
b semicellula copulatione evacuata a vertice visa; c zygospora matura 
(omnes fig. 400 amplif.). 
STAURASTRUM LÆVE Ralfs 8 CLEVEI n. var. — a cellula vegetativa a 
fronte visa; in semicellula superiore omnes sex radii, in inferiore tres 
soli conspicui sunt; d cellula vegetativa a vertice visa (utraque fig. 400 
amplif.). 
DocIDIUM GRACILE mihi. — a cellula vegetativa a fronte visa (200 amp- 
lif.); in apiee cellule superiore duo, in inferiore unus tantum trium pro- 
cessuum terminalium eonspieui sunt; 5 semicellula evaeuata a fronte 
visa (300 amplif.); duo soli processus terminales sunt conspicui. 
CLOSTERIUM CALOSPORUM n. Sp. — a et b cellule vegetativæ evacuate a 
fronte vise; ¢ cellule dus copulate cum zygospora semimatura, in ea- 
nali eopulationis adhue inclusa; d zygospora matura cum semicellulis 
quattuor evaeuatis, reliquiis duarum cellularum eopulatarum (omnes fig. 
400 amplif.). 
SPHJEROZOSMA BAMBUSINOIDES n. Sp. — a series cellularum vegetativarum a 
fronte visarum; 5 series cellularum vegetativarum a latere visarum; 
e cellula vegetativa a vertice visa (omnes fig. 400 amplif.). 
HYALOTHECA DUBIA Kütz. 8 Lavis n. var. — Series cellularum vegetati- 
varum a fronte visarum (400 amplif.). 
