48 
The fact that it is found not at all in W. Norway, where G. 
locusta is very common, seems to suggest, that it is not derived 
from this species, and that Sars is right in his theory (see above); 
but I regret that my material does not allow me to investigate 
whether it is, in spite of what is known as to distribution, derived 
from a marine species /G. locusta). 
From the foregoing it may be seen that albeit the salinity has 
great influence on the species as regards variations of the setosé 
furniture (vide Sexton 1912) also the variations of plastic cha- 
racters are so wide in characters which are considered specific, 
that it is very difficult, or practically impossible, to determine the 
species with certainty. — 
Below is given a list of localities. A ,station" in the following 
list is not what is generally called a station: the fjord is divided up 
into 10 parts, and every part is called a station (a map of the stations 
will be found in ,Randers Fjords Naturhistorie, ved Dr. A. C.J& 
hansen", now going to the press). St. 1 is Randers, st. 2 — 
Tjæreby Bredning; st. 3 — Kloster Ladested; st. 4 — Floes; st. 6 
= Snævringen (st. 4 and 6 lie in the Grundfjord); st. 5 — Uggel- 
huse; st. 7 — Hollandsbjerg Flak; st. 8 lies between Mellerup and 
Voer; st. 9 off Holbækgaard; st. 10 is the mouth of the fjord (Ud- 
byhøj). — 
The salinities are as follow: 
ES ED ere 
Skr | 2 3 5 7 8 9 sg 
Depth in m | ] 
( (00 02 03 15. 25 530 2 NE 
1 (00 02 08 24 33 sg 128 BØ 
2 00 02 09 37. 51 80 139 Mg 
E- 00 or 23 88 70 lo SE MR 
4 00 08 32 44 04 ms RE RE 
5 03 180 32 74 0 12k 480 MR 
