72 
nemlig i en liden Vandpyt veil Preston (Trondhjems Stift) 
og i en G-roft ined halvt brakt Vand paa Sando (Hval- 
perne) ved Udlobet af Christianiafjorden. Arten er kjendt 
fra Sverige, Danmark, de britiske 0er og Tyskland. 
297. Daphnia pulex, Lin. 
Donne meget variable og vidt udbredte Art obser- 
veredes under Expeditionen ved Vardo sammen med fore- 
gaaende Art og desuden i Damme ved Reikjavik (Island). 
Den er anfort af saagodtsom alle Autores, der bar befattet 
sig med Studiet af denne interessante Krebsdyrgruppe. 
298. Simocephalus vetulus, (Mull). 
Ikke ualmindelig i Smaadamme ved Reikjavik ; ligesom 
foregaaende vidt udbredt over hole Europas Eastland og 
paa de britiske 0er. 
Fam. 2. Lynceidse. 
299. Chydorus sphsericus, Mull. 
Dette var den eneste Cladocer, som observeredes paa 
Spitsbergen. Den forekom i ringe Mamgder i de samme 
Myrpytter ved Adventbay, hvori Lepidurus glacialis fandtes. 
Arten synes i Europa at have en vid geografisk TJdbred- 
ning og er anfort af alle Autores paa dette Eelt. 
300. Alona obionga, P. E. Midler. 
Af og til i Smaadamme ved Reikjavik. Den. er hos 
os en af de alleralmindeligste Arter af Slsegten og desuden 
kjendt fra Sverige, Danmark, Preussen og de britiske Der. 
in this country, viz. — from a diminutive pool of water, 
at Erosten (Trondhjems Stift), and from a trench, filled 
with brackish water, on the island of Sando (Hvalperne), 
at the mouth of the Christianiafjord. The species is 
known from Sweden, Denmark, the British Islands, and 
Germany. 
297. Daphnia pulex, Lin. 
This most variable and widely distributed species was 
observed on the Expedition at Vardo, along with the pre- 
cedig form, as also in ditches near Reikjakvik. Iceland. 
The form is recorded by well-nigh all authors that have 
made this interesting group of Crustacea the subject of their 
study. 
298. Simocephalus vetulus, (Mull). 
Not uncommon in small ditches near Reikjavik; like 
the preceding distributed over the whole of the continent 
of Europe and the British Islands. 
Fain. 2. Lynceidse. 
299. Chydorus spliaericus, Muller. 
This was the only Cladoceran observed in Spitzbergen. 
It occurred, in limited numbers, in similar moorland-pools, 
at Advent Bay, where Lepidurus glacialis was taken. The 
species would appear to have a wide geographical distribu- 
tion throughout Europe, and is recorded by all authors 
from that region. 
300. Alona obionga, P. E. Muller. 
Now and again in small ponds near Reikjavik. I n 
Norway, it is one of the commonest species of the genus, 
and moreover is known from Sweden, Denmark, Prussia, 
and the British Islands. 
