292 



с. H. Ostenfeld. 



2. Tintinnopsis ? pellucida (Cleve) Brandt, 1906, p. 18, 1907, 



p. 172, pi. 23, figs. 8, 14, 15; Tintin- 

 mis (?) pellucidus Cleve, 1899, p. 24, 

 pi. 1, fig. 4; T.bottniciis Brandt, 1896, 

 p. 53, pi. 3, fig. 11; Leprotintinnus bott- 

 nicus Jørgensen, 1899, p. 10; 1900, 

 pi. 2, fig. 3; L. pellucidus Jørgensen, 

 1901, p. 18. (Fig. 2). 



In one sample from September 

 1907 from Danmarks Havn and in 

 two July-samples from the pack-ice 

 T. pellucida was present, but rather 

 rare. The annexed figures show the 

 variability of the houses: rings are 

 present or not, the lower part is 

 straight or faintly curved, the foreign 

 bodies are more os less abundant, 

 etc. 



The contracted animal figured in 

 the left figure had two distint nuclei. 



Length of the houses 330—344 fj. 



(Brandt 0,2-0,27 mm.) Breadth 32 and 



4:8 JUL (narrowest and largest part). 



Distrib.: Karajak Fjord; Davis Strait; N. and W. of Spitsbergen; Nor- 

 wegian Coast off Bergen. 



Fig. 2. Tintinnopsis pellucida (Cleve 

 Brandt. 250 t. in. 



Cyttarocylis Fol, 1881. 



3. Cyttarocylis pseudannulata Jørgensen, 1901, p. 15, pi. 2, 

 fig. 28; Brandt 1906— 07, p. 269, pi. 28, fig. 8, pi. 29, fig. 1; С annulata 

 Jørgensen, 1899, p. 36. 



Only found in few specimens in a single sample from the pack- 

 ice in August 1006. 



Distrib.: Irminger Sea; N. E. of Jan Mayen; Norwegian West-coast. 



4. Cyttarocylis denticulata Ehrbg., Jørg. emend.; Jørgensen 

 1899, p. 31, pi. 2, figs. 13, 15; 1901, p. 12, pi. 3, figs. 25—26; 1905, p. 144; 

 Brandt 1906-07, p. 232, pi. 37, figs. 9— 10, 15-17; non С. denticulata 

 Brandt 1896, p. 62, nee Ostenfeld, in M.Knudsen & C.Ostenfeld, 

 Iagttagelser over Overfladevandets Temperatur, Saltholdighed og Plank- 

 ton paa islandske og grønlandske Skibsrouter i 1898, København 

 1899, p.62. 



The forms belonging to the group С. denticulata are of great 

 importance for the plankton of the area here treated of. When we 



