BIHANG TILL K. SV. VET.-AKAD. HANDL. BAND 1. N:0 13. 27 



138. Nitzschia socialis Greg. (T. M. Soc. V, pag. 80, PL 

 I, fig. 45) Greenland 



139. Nitzschia angularis Sm. (Syu. I, pag. 40, Pl. XIII, 

 fig. 117) Greenland. Foimd before on the coasts of Gr. Bri- 

 tain and according to Grimow iu the Adriatic sea. 



140. Nitzschia insignis Greg (T. M. S. V. pag. 80, Pl. I, 

 fig. 46) Spetsbergen Brandwyns Bay, Hiulopen Strait, Schoal 

 Point, Kings Bay. Greenland. Finmarken. Found before in 

 Glenshira sand (fossil) Scotland, Gregory, and according to Gru- 

 now in the Adriatic sea. 



141. Nitzschia Closterium (Bhb) Sm (Syn. I, pag. 42, Pl. 

 XV, fig. 120) Spetsbergen. 



142. Nitzschia cpnstricta Kg (Sm Syn. I, pag. 41, PL 

 XIII, fig. 112) Spetsbergen Hackluyts, Wijde Bay. Found 

 also in the Atlantic, and according to Grunow in the Me- 

 diterranean and Pied seas. Cape of Good Hope. West In- 

 dies {Cl). 



143. Nitzschia vitrea Norman (T. M. S. X. S. I, pag. 7, 

 Pl. II, fig. 4) Spetsbergen Hackluyts. Found near Hull. 



144. Nitzschia macilenta Greg. (Gre ville in M. I. VII, 

 pag. 83, Pl. VI, fig. 8—9) Spetsbergen Hackluyts. Found be- 

 fore in Scotland (Gregory) and in the Adriatic sea (Grunow). 



During the two last Swedish expeditions to Greenland 

 several samples of diatoms were coUected on the surface of 

 the sea between Europé and Greenland as well as in Davis 

 Strait. The variety of forms was not; very great in these 

 samples, most of them, collected in the month of June, con- 

 tained: Thassosira Nordenskiöldii, Chgetoceros de- 

 cipiens. Besides v^ere found in samples from the Atlantic 

 Rhizosolenia styliformis. Samples, collected in the month 

 of August in Davis Strait, contained principally Sy ne dra 

 Thalassotrix. 



