210 



!■;. Jargensen. 



Caloneis i i.. 

 Cl. Synops. Navic. 1 >i ; 1 1 . I. p. 46. 



Valve striate; .stria' parallel, except at the ends, crossed on 

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

 necting zone not complex. 



C. liber (W. Sm ) Cl. 



(i.. 1. c. p. 54. Navicula I. W. Sm. Brit. Hint. I. p. 48, pi. 16. f. 133. 



var. linearis (Gbun.) VH. 

 VH. Synops. pi. 12, f. 35. Navicula I. Gbun. Vein. 1860, p. 546. pi. 3, f. 2. 



Frequent: Stamsund f. Svolvaer -f- c, the Ostnesfiord r-f-, 

 Raftsund r, Stene r +, Gaukva-ro -j- 

 Distribution : Cosmopolitan. 



Tar. maxima (Greg.) 

 Navicula m. Greg. Diat. of Clyde p. 487, pi. IX. f. 18. A. Schm. Nords. Diat 



pi. II. f. 44. 



Frequent: Stamsund 4 c, Stene r+. 



Distribution: Coasts of the North Sea and Western Europe. 



var. elongata (Grin.) Cl. 



Cl. 1. c. p. 55. Navicula e. Grun. in A. Scum. Nords. Diat. p. 91, pi. II, f. 42. 



Very rare: Stamsund r. 



Distribution: Coasts of the North Sea. Indian Ocean. Colon. 



C. consimilis (A. Schm.) Cl. 

 Cl. 1. c. p. 57. Navicula c. A. Schm. Nords. Diat. p. 91. pi. II. f. 46. 



Very rare: Stamsund r. 



Distribution : North Sea. Balearic Islands. 



C. amphisbosna (Bory.) Cl. 



Cl. 1. c. p. 58. Navicula a. Bory Encycl. meth., t. 2. Van Heurck Synops. 



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



Very rare : Stene. r. 



Distribution: In brackish and fresh water, frequent especially 

 in Northern and Western Europe. Caspian Sea. 



C. hrevis (Greg.) Cl. 



Cl. 1. c. p. 61. Navicula b. Greg. Diat. of Clyde, p. 478, pi. IX, f. 4. 



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



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

 Distribution: North Sea. Arctic redons. 



C. blamla (A. Schm ) Cl. 

 Cl. 1. c. p. 62. Navicula If. A. Schm. Nords. Diat. p. 90. pi. II, f. 27. 



Very rare : Stamsund r r. the ( )stnestiord r. 

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

 Ocean. Pacific Ocean. 



C. miisea (Gbeg.) Cl. 



Cl. 1. c. p. 65. Navicula in. Gbeg. Diat. of Clyde, p. 47M. pi. IX. f. 6. 

 A. Schm. Nords. Hint. p. 86, pi. I, f. 15. 



Very rare: Stamsund r. 



Distribution: Coasts of the North Sea. The Mediterranean. 

 Indian aud Pacific Oceans. West Indies. 



Mchiy.oiM'iiiii Ai. 



S. Grerillei Ac;. 

 Ag. Consp. ]). 18. Van Hedkck Synops. p. 110, pi. 16, f. 2. 



Hare: Stamsund r, Svolvser r. 



Distribution : Coasts of the North Sea and Western Europe 

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



S. criicigerum W. Sm. 



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

 Synops. p. llll. pi. Hi, f. 1. 



Rare: Svolvaer, r. 



Distribution: Coasts of the North Sea and Western Europe. 

 The Baltic. 



Stauroiu'is Ehrb. 



S. saliaa W. Sm. 



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



pl. X, f. 16. 



Rare : Stamsund r. Stene r. 



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

 Mediterranean. Black Sea. 



S. Gregorii Ealfs. 



Balfs in Pritch. Inf. p. 913. Van Hecrck Synops. p. 68. pl. A (suppl.), f. 4. 



■S'. amphioxys Gbeg. Micr. Journ. IV. p. 48, pl. V, f. 23. 



Rare: Stamsund r. Gaukvsero r. 



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

 Sea. East coast of North America. Sea of Kara. 



S. phcenicenteron Ehrb. 



Eheb. Am. pl. II, 5, f. 1 etc. Van Heurck Synops. p. 67, pl. IV, f. 21 

 (var. genuina 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. 



Xnvioiil.l Bory. 

 a. Orthostichse Cl. Synops. Navic. Diat. I, p. 107. 



Valves with small puncta. arranged in parallel transverse stria' 

 and also forming straight longitudinal ones, crossing the former at 

 right angles. 



A. cuspidata Ki'xz. 



KiJTZ. Bacill. p. 94, pl. III. tigs. 24, 37. Van Heurck Synops. p. 100. pl. XII, f. 4. 



Very rare: Stamsund r, the Ostnestiord r. 

 Distribution : Common fresh water species. 



b. Punctata? Cl. 1. c II, p. '■'<'. 



Coarse puncta. arranged in transverse stria? (radiate at the 

 ends) but not in straight longitudinal rows. 



