. Botany of the Faeröes, based upon Danish investigations. Botany -- Faroe islands. 622 V. CHRYSOMONADINEAE. (by C. H. Ostenfeld). 14. Dinobryon divergens Imhof, cfr. Lemmermann, Ber. d. deut- schen Botanischen Gesellsch., XVIII, 1900, p. 517, PI. XIX, ligs. 15—20. In Sorvaagsvatn a Dinobryon constiluted the main part of the plankton, and it also occurred sparingly in the lake in Kvanhauge. It corresponds very closely with Lemmermann's (1. c.) figures of D. cylindricum Imhof, var. divergens (Imhof) Lemmerm. This species appears to be very widely distributed; it is known throughout the whole of
. Botany of the Faeröes, based upon Danish investigations. Botany -- Faroe islands. 622 V. CHRYSOMONADINEAE. (by C. H. Ostenfeld). 14. Dinobryon divergens Imhof, cfr. Lemmermann, Ber. d. deut- schen Botanischen Gesellsch., XVIII, 1900, p. 517, PI. XIX, ligs. 15—20. In Sorvaagsvatn a Dinobryon constiluted the main part of the plankton, and it also occurred sparingly in the lake in Kvanhauge. It corresponds very closely with Lemmermann's (1. c.) figures of D. cylindricum Imhof, var. divergens (Imhof) Lemmerm. This species appears to be very widely distributed; it is known throughout the whole of Central Europe, and I have seen it in planklon both from Norway and Iceland; and it is possible that the I), sertnlaria reeorded by N. Wille1 from Norway and by O. Borge2 and A. Cleve3 from Sweden is identical with this species. VI. PERIDINIACEAE. (by C. H. Ostenfeld). In none of the samples which have been examined does the Peridiniaceae bear any prominent part, but 3 species in all have been found, one of which, Peridiniiun Willei appears to occur in most of the Iakes. 15. Peridinium Willei Huitfelt-Kaas, Die limnetischen Peridineen in norwegischen Binnenseen, Christiania Vidensk. Selsk. Skrifter, 1900, No. 2, p. 5, figs. 6—9. This species of which Huitfelt-Kaas gives an exhaustive description accompanied by good figures, was first found in the Norwegian lakes Fig. 150. Peridinium Willei Huitf-Kaas. The arrange- where none of the other coiiimon species ol ment of ti,c piatea of the Europe, p fabulatum and P. cinctum have been distal limb. (C. H. O. del.) l ' reeorded. It might be concluded therefore that the Norwegian species is only a form of one of these, P. cinc- tum, which it closely resembles in outward shape. I examined the material very carefully in order to ascertain the distribution of the piates, and for comparison I made usc of Danish material of P. cinctum which Dr. Wesen berg-Lund kindly placed at my 1 Wille, N.: Algolog. Notizen VII, Nyt Magaz., f. Naturvi
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