48 
oP Py 
DNS 
Pp. T. CLEVE. PLANKTON, COLLECTED BY THE SWEDISH EXPEDITION TO SPITZBERGEN. 
Fungella arctica CL. 
Plate I 
Tintinnus (?) calyptra CL. 
Tintinnus minutus BRANDT . 
Tintinnus (?) pellucidus CL. .. . : 
Actinomma boreale CL. a Primordial shel 
shell, d@ Structure of c 
Artrostrobus annulatus BAIL. . 
Aulacantha levissima H&L. 
Beroetta melo CL. 
1, 6 Secundary (Haliomma-)shell, ¢ Tertiary (Actinomma-) 
Challengeron Nathorstii CL. a Entire shell, d Structure 
Botryopyle setosa Cu. 
a Shell, 4 Séptum 
Pag. 
22. 
24, 
24. 
24, 
26. 
27. 
27, 
27. 
28. 
27. 
