Chlorophyceæ. 
Oedogoniaceæ. 
*15. Oedogonium oblongum Wittrock. Lat. cell, veget. 
8 — 10 g, long. oog. 32 — 40 g, lat. oog. 22—26 g, long, 
oosp. 26 — 32 g, lat. oosp. 20 — 28 g. 
16. Oedogonium sp. 
Ulothrichaceæ. 
*17. Stichococcus scopulinus Hazex. There may be great 
doubt, if this plant should really be placed in the 
genus Stichococcus. There are very good reasons for 
referring it to Ulothrix or Gloeotila, but these three 
genera are far from clearly defined, and in the recent 
algological literature there is wild confusion about the 
right definitions of the three genera and others of the 
Ulothrichaceæ. 
The only method to obtain clearer definition of 
such Algæ is to study their method of propagation 
thoroughly. 
The cytology should also be considered, and the 
variation under natural conditions, not only in pure 
cultures on Agar or in nutritive solutions. 
Snadden Bay. Lat. fil. 2,6 — 4 g. 
Planosporaceæ. 
*18. ( 'ldorococcum infusionum (Schrank) Menegh. 
Scenedesmaceae. 
*19. Scenedesmus quadricauda (Turp.) Breb. 
Conjugatæ. 
Zygnemaceæ. 
20. Zygnema sp. 
*21. Spirogyra Grevilleana (Hass.) Kuetz. 
22. Spirogyra sp. 
Desmidiaceæ. 
*23. Gosmarium prœmorsum Breb. forma. An inter- 
esting form of this species occurred in quantities. No 
doubt it is really a form of Gosmarium prœmorsum , and 
not of ('. margaritiferum, but in some respects it seems 
