804 Proceedings of Royal Society of Edinburgh. [sess. 
pages hamatus was common in April, but less so in May and 
September ; Temora , though present in the seven samples, appeared 
to be scarce in all of them. The Acarlia was the most common 
of the five species referred to, especially in the September 
gatherings, as shown in the following tabulated list of all the 
species : — 
Month 
| 
April 
May 
September 
Date 
25 
15 
5 
9 
11 
24 
26 
Locality 
Ettrick Bay, Bute. 
Mauchrie Bay, Arran. 
Loch Ranza, Arran. 
Brodick Bay, Arran, j 
Ettrick Bay, Bute. 
Ettrick Bay, Bute. 
Loch Eanza, Arran. 
Copepoda. 
Calanus helgolandicus, Claus, 
fr 
ab 
f 
fr 
fr 
f 
r 
P seudocalanus elongatus, Bk., . 
fr 
f 
c 
c 
c 
fr 
c 
Centropages typicus, Kr 
2 
,, hamatus (Lillj.), 
Isias clavipes, Bk., .... 
c 
fr 
fr 
f 
f 
f 
fr 
r 
Temora longicornis (Mull.), . 
f 
f 
f 
f 
f 
r 
r 
Anomalocera Pater soni, Tempi., 
f 
f 
r 
r 
Acartia Clausi, Griesb., 
fr 
fr 
c 
ab 
c 
c 
c 
Oithona similis, Claus, .... 
fr 
f 
fr 
fr 
fr 
Crustacea (ceter). 
Evadne Nordmanni , Loven, 
fr 
fr 
f 
f 
fr 
Podon intermedius, Lillj., . 
f 
f 
f 
,, Leuckarti, Gr. 0. Sars, 
f 
fr 
Microniscus (larvae of Isopod species), 
r 
r 
Young Crustacea — Decapoda, Bal- 
ani, etc. , 
f 
f 
f 
fr 
r 
Centropages typicus, Kroyer, so frequent round the north-east 
and north of Scotland, was only observed in one of the September 
samples; so also was Isias clavipes, Boeck, a species though not 
unfrequent round the south and west of the British Islands is very 
sparingly distributed along the whole east side of Scotland and on 
the west side north of the Firth of Clyde. Anomalocera Pater soni, 
Templeton, one of the most finely coloured of the pelagic Cope- 
poda found in the British seas, and which sometimes occurs in 
considerable swarms, was only noticed very sparingly in four 
gatherings. Oitliona similis , Claus, which was more or less 
frequent in the September gatherings, was absent in those collected 
in April and May. 
