E. Jørgensen. 



Caloneis Cl. 



Cl. Synops. Navic. Diat. I, p. 46. 



Valve striate; striæ parallel, except at the ends, crossed on 

 each side of the raphe by one or more longitudinal lines. Con- 

 necting- zone not complex. 



C. Uber (\V. Sm ) C'l. 



Cl. 1. c. p. 54. Sacmda I. W. Sm. Biit. Diat. I. p. 48, pi. 16, f. 133. 



var. linearis (Ghun.) VH. 



VH. Synops, pl. 12, f. 3.">. Xariada 1. Grun. Veih. 1860, p. 546. pi. 3, f. 2. 



Frequent: Stamsund f, Svolv;fr -(- c. the Østnesfiord r+, 

 Raftsund r, Stene r +, Gaukværø +. 

 Distribution : Cosmopolitan. 



Tar. maxima (Gheg.) 



Navicula m. GnEC. Diat. o! Clyde ).. 4S7, jil. IX, f. 18. A. Schm. Nords. Diat. 



pi. II, f. 44. 



Frequent: Stamsund 4 c, Stene r +. 



Bisfrihiition: Coasts of the North Sea and We.stern Europe. 



var. elongata (Grin.) Cl. 

 ('L. 1. c. p. 55. A^ai'kuln e. Grun. in A. Schm. Nords. Diat. p. 91, pi. II, f. 42. 



Very rare: Stamsund r. 



Distribution: Coasts of tlie Nortli Sea. Indian Ocean. Colon. 



C. consimilis (A. Schm.) Cl. 

 Cl. 1. V. p. 57. Xavicula c. A. Schm. Nords. Diat. p. 91, pi. II, f. 46. 



Very rare: Stamsund r. 



Distribution: North Sea. Balearic Islands. 



C. aiiiphislici'xa (Boby.) Cl. 



Cl. 1. c. p. 58. Xnrinda a. BoRv Encycl. meth., t. 2. Van Heurck Synops. 



p. 102, pi. XI, f. 7. 



Vci-y rare: Stene, r. 



Distribution: In bracki-sli and freshwater, frequent especially 

 in Nortlicrn and ^^'esterll P]urope. Caspian Sea. 



C. brevis (Gbeg.) Cl. 



Cl. 1. c. p. 61. Xavicula h. Greg. Diat. of Clyde, p. 478, pi. IX, l'. 4. 



A. Schm. Nords. Diat. pi. II, f. 15. 



Very rare: Stamsund r, the Østnesfiord r, Stene rr. 

 Distribution: Nortli Sea. Arctic regions. 



C. blanda (A. Schm.) Cl. 

 Cl. 1. c. p. 62. Xni-kula h. A. Schm. Nords. Diat. p. 90, j)!. 11, f. 27. 



Very rare: Stamsund ri-. the Østnesfiord r. 

 Distribution: Coasts of tlii' Noitli Sea. Black Sea. Indian 

 Ocean. Pacific Ocean. 



C. musca (Greg.) ('l. 



Cl. 1. c. p. 65. Xavicula m. (iiuiv.. Diat. of Clyde, p. 479, pi. IX, l'. 6. 



A. Schm. Nords. Diat. |i. Hii, j)!. I, l'. 15. 



Very rare: Stamsund r. 



Distribution: Coasts of the North Sea. Tlie Meditoi-ranean. 

 Indian aud Pacific Oceans. West Indies. 



8cliiKonenia Ag 



S. Grevillei Ag. 



Ag. Coiisp. p. 18. Van Hei'HCk Synops, p. 110, pi. 16, f. 2. 



Rare: Stamsund r, Svolvær r. 



Distribution: Coasts of the North Sea and Western Europe, 

 frequent. Arctic regions. West Indies. California. Kerguelen. 



S. crueigerum W. Sm. 



W. Sm. Brit. Diat. II. p. 74, pi. 56. fig. 354: pi. 57, f. 356. Van Heurck 



Synops, p. 110. pi. 16, f. 1. 



Rare: Svolvær, r. 



Distribution: Coasts of the North Sea and Western E^urope. 

 The Baltic. 



Stanroneis Ehrb. 



S. salina W. Sm. 



W. Sm. Brit. Diat. I. p. 60, pi. 19, f. 188. Van Heurck Synops, p. 68, 



pi. X, t'. 16. 



Rare: Stamsund r, Stene r. 



Distribution: Coasts of the North Sea. The Baltic. The 

 Mediterranean. Black Sea. 



S. Gregorii Halfs. 



Bales in Peitch. Inf. p. 913. Van Heurck Synops, p. 68. pi. A (suppl.). f. 4. 



S. amphioxys Greg. Micr. .Jonrn. IV, p. 48, pi. V, f. 23. 



Rare: Stamsund r, Gaukværo r. 



Distribution: Coasts of the North Sea. Black Sea. Caspian 

 Sea. East coast of Nortli America. Sea of Kara. 



N. iilupniccnfcroii Ehkb. 



Ehrb. Am. pi. II, 5, f. 1 etc. Van Heurck Synops, p. 67, pi. IV, f. 21 



(car. gemmm Cl. Synops. Navic. Diat. I, p. 149). 



Very rare: Stene, r. 



Distribution: Fresh water species, especially frequent in Nor- 

 thern and Western Europe. America. New Zealand. 



Xavicula Bory. 

 a. Orthostichæ Cr.. Synops. Navic. Diat. 1, p. 107. 



\"alves with small puncta. arranged in parallel transverse striæ 

 I and also forming- straight longitudinal ones, crossing' the former at 

 right angles. 



N. rus]ii(hit(( Ki'TZ. 



KUTZ. Bacill. ],. 94, pi. 111. tigs. 24. 37. Van Heukck Synops, p. 100, p]. XII, t. 4. 



Very rare: Stamsund r. the Østnesfiord r. 

 Dlstribatio)i: Common fresh water species. 



b. Piimtatæ Cl. 1. c. II, p. 37. 



Coarse puncta, arranged in transverse striæ (radiate at the 

 ends) but not in straiglit longitudinal rows. 



