794 Proceedings of Royal Society of Edinburgh. [sess. 
Remarks on the Species. (1) The Copepoda. 
* Calanus helgolandicus , Claus. — The Calanus mentioned here 
is not the typical C. finmarchicus (Gunner), hut the form 
described by Claus, which G. 0. Sars considers to be specifically 
distinct. This form occurred in considerable numbers from the 
end of April to the first week in June, and also in September^ but 
was only sparingly represented in the samples collected in July 
and August ; indeed, in four of these samples this species appeared 
to be entirely absent. 
Paracalanus parvus (Claus) was observed in five of the samples, 
but only a few specimens were obtained ; these samples were all 
from the vicinity of the Marine Station. 
Pseudocalanus elongatus , Boeck. — This Calanoid, though not so 
plentiful as the Calanus , was observed in nearly the same number 
of samples, and appeared to have a somewhat similar seasonal 
distribution. 
Euchceta norvegica , Boeck, was only noticed in the sample from 
Loch Striven ; it is abundant in Loch Fyne, but usually near the 
bottom and in the deeper parts of the loch. 
Centropages hamatus , Lilljeborg. — This species occurred in all 
the samples examined, save two ; its seasonal distribution was 
somewhat similar to that of Calanus , being generally common or 
frequent from April till June, after which time it appeared to 
become scarcer. 
Temora longicornis (Muller), though sometimes occurring in 
considerable abundance, was only sparingly observed in the 
plankton samples under consideration, and its seasonal distri- 
bution appeared to be somewhat the reverse of that of the 
species already referred to. It was only noticed in four of the 
seventeen samples collected in April and May, and was only absent 
in three of the remaining twelve samples. 
Anomalocera Patersoni , Templeton. — This species occurred more 
or less sparingly in twelve of the samples collected during April, 
May, and June, but was absent in all the others. 
Parapontella brevicornis (Lubbock) was only noticed on four 
* The names and classification of Prof. G. 0. Sars’ great work on “The 
Crustacea of Norway ” are followed here. 
