12 Pp, Tt. CLEVE. PLANKTON, COLLECTED BY THE SWEDISH EXPEDITION TO SPITZBERGEN. 
7. King Charles Land. Round Spitzbergen. North west of Spitzbergen. 
Temperature —0,5s to 
August 13th. August 25th. 
+ 3,44. 
Salinity about 33 p. m. 
The plankton is constituted by cheto-, tricho- and arctic neritic plankton. 
The following were th 
Cheetopl. 
Chetoceros borealis +, 
C. criophilus r, 
C. decipiens +, 
Pheocystis Pouchetii r. 
e most important: 
Trichopl. 
Calanus finmarchicus 1, 
Fritillaria borealis 1, 
Cyttarocylis denticulata 1, 
v. gigantea c, 
v. media r, 
Tintinnus borealis r, 
Ceratium arcticum ce, 
Chetoceros atlanticus r, 
C. boreal. v. Brightwellii r, 
C. criophilus r, 
Coscinodiscus oculus iridis rr, 
Rhizosolenia obtusa r, 
Thalassiosira gravida r. 
Arctic neritic plankton. 
Cyttarocylis dentic. v. obtusa ¢, 
Fungella arctica r, 
Ptychocylis obtusa c¢, 
Dinobryum ce, 
Peridinium pellucidum -+-. 
Besides these species were found Oithona similis, common in some gatherings, and 
the following of the northern neritic plankton: Ceratium (tripos v.) longipes r, Chetoceros 
diadema rv, Leptocylindrus da 
nicus 1. 
8. West of Spitzbergen—Beeren Hiland. 
Temperature 5,34 to 7,24. 
August 28th to September 4th. 
Salinity about 35. 
The plankton is composed of styliplankton, usually predominant, and trichoplankton. 
The most important forms are: 
Styliplankton. 
Microsetella atlantica r, 
Oithona similis c, 
Oncea minuta +, 
Globigerina bulloides r, 
Challengeria tridens 
Litholophus ligurinus r, 
Chetoceros borealis v. solitaria +, 
C. volans ce, 
Corethron hystrix 1, 
Rhizosolenia alata 7, 
Trichoplankton. 
Calanus finmarchicus, 
Fritillaria borealis, 
Cyttarocylis denticulata r, 
r, 
var. 
var. media e, 
edentula +, 
var. gigantea 1, 
Ptychocylis acuta r, 
Tintinnus secatus r, 
T. minutus r, 
Ceratium tripos v. arctica r, 
