286 



219. S. ovalis Bréb. var. ovata Kutz., V. H. Syn. tab. LXXIII, 

 figs. 5—6. 



Found dispcrsed in the material. 



Var. minuta Bréb., V. H. 1. c, fig. 10. 



Lej num (S t r 6 m 6). 



In a gathering from Bosdalafos (Vaago) I found a small almost 

 circular Surirella, the valve measures 0,02 mm. in length and 0,018 mm. 

 in breadth. The canaliculi — ten on each side — extend far towards the 

 central line, so that the breadth of the area is reduced to 0,004 mm. It 

 corresponds most closely to the form figured in A. S. tab. XXIII, fig. 54 

 under tiie name of S. ovata Kiitz. 



220. S. Brightwellii W. Sm., A. S. All. tab. LVI, figs. 17—18. 

 Bosdalafos (V a a g 6). 



Coccochromaticæ. 



MERIDION Ag. 1824. V. H. Syn. p. 161. 



221. Meridion circulare Ag., V. H. Syn. tab. LI, figs. 10— 15. 

 Scattered about in niany of the gatherings, but never in large quantity. 



DENTICULA Kiitz. 1844. V. H. Syn., p. 159. 



222. Denticula tenuis Kiitz. var. frigida Grun., V. H. Syn. tab. 

 XLIX, figs. 35—38. 



Plankton from Sorvaagsvatn (^Vaago). 



DIATOMA De Cand. 1805. V. H. Syn., p. 159. 



223. Diatoma elongatum Ag., W. Sm. Syn. tab. XLI, fig. 311, 



V. H. Syn. tab. L, figs. 14, 18—22. 



Scattered about in many of the gatherings. In one from Skopen 

 (Sand 6) more common. Varies somewhat in size. Plankton. 



224. D. hiemale (Lyngb.) Heib., V. H. Syn. tab. LI, figs. 1—2. 



Var. mesodon Kiitz., V. H. 1. c, figs. 3 — 4. 



Very common in the material 1 have had for examination. Several 

 of the gatherings, e. g. from Klakken (Bord6\ Nolso and Sando Bæk 

 (San do) consist mainly of this species. The variety occurs intermingled 

 with the main species. 



FRAGILARIA Lyngbye 1819. V. H. Syn., p. 155. 



225. Fragilaria virescens Ralfs, V. H. Syn. tab. XLIV, fig. 1. 

 Not rare. In gatherings from Skjælling (S trom 6) and Nolso, common. 



