Diatoms. 



2< 13 



Distribution: Coasts of the North Sea and Western Europe. 

 The Mediterranean. 



G. distans (Gkeg.) Grun. 



Grun. in Van Heurck Synops. pi. 36, figs. 15—16. DentinUa d. Greg. Hint. 



of Clyde p. 495, pi. X. f. 36. 



Very rare: Stene r; Stamsund r. 



Distribution: ('oasts of Western Europe. Sweden. The Me- 

 diterranean. 



g. Eunotiex. 



Eunotia Khrr. 



Fresh water species. 



E. iin-iis Ehrb. 



Van Heukck Synops. p. 141, pi. 34, f, 2. 



Very rare: Stene r. 



Distribution: Common fresh water species. 



E. major (W. Sm.) Rabenh. 

 Van Hcubck Synops. p. 142, pi. 34, i'. 14. 



Very rare: 0stnesflord r. 



Distribution: Fresh water species from Western Europe. 



E. pectinalis (Dillw.?) 1\.\benh. 

 Van Heurck Synops. p. 142, pi. 33, figs. 15 — 16. 



Very rare : Svolva?r r, Gaukvaero r. 

 Distribution: Common fresh water species. 



E. prcerujita Eheb. 



Van Heurck Synops. p. 14:i pi. 34, f. 19. 



Very rare: Ostnesiiord r, Stene r. 

 Distribution: Northern Europe. America. 



I-:. Udentula W. Sm. 



W. Sm. Brit. Dial. II, p. 83. 



Very rare: Gaukvaero rr; Stamsund rr. 



Distribution: Great Britain and Ireland. 



E. triodon Eheb. 

 W. Sm. Brit. Diat. I. p. Hi. pl. 2. f. IS. Van Heurck Synops. pi. 33, f. 9. 



Very rare: Gaukvaero r; Stene r. 



Distribution: Northern Europe. Switzerland. Cayenne. 



Ceratoneis arcus (Eiirb.) Kutz. 

 Van Heurck Traite d. Diat., p. 305, f. 69. 



Fresh water species. 

 Very rare: Gaukvaero, r. 



Distribution: Common fresh water species, especially in alpine 

 localities. 



io. Meridionese. 



Meridian circulare (Grew) Ag. 

 Van Heurck Synops. p. 161, pl. 51, figs. 10 — 12. 



Fresh water species. 



Very rare: Svolvaer. Only two cells of a chain. 



Distribution: Common fresh water species in temperate regions. 



ii. Tabellariese. 



Tabelluria floccufosa (Roth) Kutz. 

 Van Heurck Synops. p. 162, pl. 52, tiys. 10—12. 



Fresh water species. 



Rare: Svolvaer r, Gaukvaero r, Stem' r. 



Distribution: Common fresh water species. 



Hli-iat<-ll;i unipunctata (Lyngb.) Ag. 



Cf. above p. 103. 

 Very rare: GaukvaTo r. 



Distribution: Frequent on the coasts of Europe. Finmark. 

 The Red Sea. Cape Horn. 



Itlialxlom'ma Kutz. 



R. minutum Kutz. 

 Kutz. Bacill. p. 12li, pl. 21, f. II. 4. Van Heuhck Synops. p. L66, pl. 54, 



figs. 17 21. 



Frequent: Stamsund r, Svolvaer e, Raftsund r, Gaukvsero r, 

 Stene +■ 



Distribution: Frequent on the coasts of Europe, especially 

 on the western and northern ones. Arctic regions. Cape of Good 

 Hope. 



R. arcuatum (Lyngb.) Kutz. 



Kutz. 1. c. p. 126. pl. 18, f. VI. Van Heurck Synops. p. 166, pl. 54. figs. 14—16. 



Diatoma a. Lyngb. Hydroph. p. 180, pl. 62. 



Frequent : Svolvaer -f- c, Raftsund r, Gaukvsero r, Stene r -+-• 

 Distribution : Frequent on the coasts of Europe and North 

 America. Arctic regions. 



R. adriatieum Kutz. 



Kutz. Bacill. p. 126, pl. 18, t'. 7. Van Heurck Synops. p. 166, pl. 54, tigs. 11 — 



13. Tessella catena Ehrb. Mikrogeol. pl. 22, f. 65. 



Rare: Svolvaer r, Raftsund rr, Stene rr. 



Distribution: Frequent on the coasts of Europe aud America. 

 Finmark (rr Cleve who remarks (Vetraexped. p. 4S4) that this 

 species else is wanting in the arctic regions). Africa. Pacific 

 Ocean. 



(■railimatopliorn Ehrb. 



G. islandica Ehrb. 

 Van Heurck Synops. pl. 53. f. 7. 



Not unfrequent: Stamsund r, Svolvaer r, Raftsund r, Brettesnes — 

 Skroven r, Stene r -f . 



Distribution : Northern ami western coasts of Europe. North 

 Pacific. Cape Horn. 



G. serpentina E.u ps. 



Ealfs in Ann. ami Mag. XI. pl. IX f. 5. Van Heurck Synops. pl. 53, %s. 1 — 3. 



Frequent: Moskenstrommen r+. Stamsund r, Svolvaer r, Raft- 

 sund r+, Brettesnes — Skroven r, GaukvaTo r, Stene r. 



Distribution : Frequent on the coasts of Europe. Ceylon. 

 Cape Horn. Antarctic regions. 



