ÖFVERSIG-T AF K. VETENSK.-AKAD. FÖRHANDLINGAR 1899, N:0 10. 973 



50°— 56° N. 31°— 23° W. (November 1898) — 

 Desmo-plankton. 



Temperature: 11 to 27. 



Salinity: 35,32 to 36,71 (on the Newfoundland 

 Banks 32,20 to 34,52). 



Fig. 450 times magnified. 



Leprotintinnus Brandtii (NORDQUIST). 



Under the name of Codonella Brandtii NoRDQUiST has des- 

 cribed (Medd. af Soc. p. Fauna et Flora Fennica part 17 1890 — 

 92, fig. 1, 2) a characteristic form from the Baltic, which belongs 

 to the new genus Leprotintinnus, proposed by JöR- 

 GENSEN (Bergens Museums Aarbog 1899 No. II). 



This form I found abundantly in a sample from 

 the north coast of South America (Mareh 1898 at 

 6° 35' N. 54° 51' W., temperature 25,9). As will be 

 seen from the annexed figure there is no perceptible 

 difference between the Baltic and South American 

 form, which thus like many other species inhabiting 

 brackish water, has a verv wide distribution. 



Fig. 225 times magnified. 



Porella n. gen. 



House closed at the apical end, without f^-^"^'" "~^^ 

 proboscis, porous. 



F. apiculata n. sp. House cylindrical. , 



three times as long as it is broad, with api- 

 culate end. Mouth simple, not defined. Pores 

 numerous orbicular of somewhat diflFerent size, <• 



arranged in irregulär transverse rows. 



Length: 0,11 to 0,13 mm. Diameter of 

 the mouth: 0,033 mm. \^ 



Habitat: very rare at 20° S. 2° E. (June \. 

 1899) in styli-plankton. Temperature: 20,7. ^^..^ ff% 



Salinity: 36,01. — Fig. 450 times magnified. 

 On the right some pores under higher power. 



