ÖFVERSIGT AP K. VETENSK.-AKAD. FÖRHANDLINGAR 1900, N:0 8. 983 



aboiit 29 in 0,01 m.m. Lenirth 0,07, breadth 0,01 in.m. — Fig. 

 11. Very rare at 45° S. 26 E. 



Nitzschia (pungens var.) atlantica Cl. (A trea- 

 tise on the phytoplankton, PI. II f. 24) was seen in 

 a sample froin 42' S. 76" E. 



Nitzschia bicapitata Cl. N. Sp. Valve lanceolate, 

 with capitate ends, iength 0,012 to 0,016 m.m. breadth 

 0,003 to 0,005 m.m. Keel very excentric. Puncta 13 

 in 0,01 m.m. Striae fine, about 26 in 0,01 m.m. — 

 Fig. 12. 



This very small species was found in saraples from 

 the Färöe Channel, hauled by the Research Expedi- 

 tion in 1896. It occurred sparingly in several samples 

 from 44° S. 9° E. to 45' S. 34' E., besides at 42' S. 

 76" E. and 34\ S. 89° E. 



Nitzscliia delicatissima Cl. (A treatise on the phyto- 

 plankton PI. II f. 22). This characteristic species, 

 which at certain periods appears in the Northern At- 

 lantic and constitutes Gran's »Nitzschia-plankton» ^;^3,8- 3 



^ lOUO t. D 



(Rep. on Norweg. Fishery and Marine investigations, 

 Vol. I 1900 N. 5 p. 61) occurred not sparingly at 

 43' S. 1° E. and at 45° S. 19" E.; 45° S. 26' E.; 

 42° S. 76' E. 



It is in the northern hemisphere a boreal, but 

 not strictiy arctic form and seems also in the southern -^qqq ^ ^ 

 hemisphere not to be a strictiy antarctic form. Its 

 occurrence in the southern hemisphere is a fact of very great 

 interest. 



Mtzschia KolaizecMi Grün. (Trans. Mic. Soc. 1877 p. 173 

 PI. CXCIV f. 10). This very characteristic species was found, 

 extreniely sparingly, in several samples from 41° S. 6' W. to 

 45' S. 29' E. and at 42° S. 76° E. 



Grünow mentions this species as found in the stomach Con- 

 tents of Salpa from the Southern Ocean, also from Honduras 

 (west or east coast?). 



Öfvers. af K. Vet.-Akad. Förh. 1900. Arg. 57. N:o 8. 2 



