48 ]'. T. CLEVE. PLANKTON, COLLECTED BY THE SWEDISH EXPEDITION TO SPITZBERGEN. 



Fig. 1 



4 

 5 



6 



7 



8 



9 



10 



Plate I. 



Pag. 



Fungella arctica Cl 22. 



Tintinnus (?) calyptra CL 24. 



Tintinnus mimitus Brandt 24. 



Tintinnus (?) pellucidus Cl 24. 



Actinomma boreale Cl. a Priniordial shell, h Secundary (Haliomma-)sliell, c Tertiary (Actinomnia-) 



shell, d Structure of c 2G. 



Artrostrobus annulatus Bail 27. 



Aulacantha laevissima Hkl 27. 



Beroetta melo Cl 27. 



Challengeron Nathorstii Cl. a Entire shell, h Structure 28. 



Botryopyle setosa Cl. a Shell, i^ Septum 27. 



