SEA-FISHERIES LABORATORY. 158 
REMARKS UPON SOME OF THE HAULS. 
All the vertical hauls taken in the deep hole, 95-106 
fathoms, off Skate Island at the mouth of Loch Fyne 
consist of a coarse zoo-plankton (see fig. 6), characterised 
by a very great number (an average of 13,000 in five 
standard vertical hauls from about 100 fathoms) of the 
common Copepod, Calanus helgolandicus. These speci- 





otis) 
Fia. 6. Copepod Plankton, consisting Fic. 7. Diatom Plankton, consisting 
wholly of Calanus helgolandicus. mainly of Rhizosolenia semispina. 
mens of Calanus are large, and many of them are of a red 
colour when alive, and associated with them are generally 
a few Huchaeta norvegica and one or two specimens of 
the Schizopod Nyctiphanes norvegicus. There are also 
in these hauls a few smaller Copepoda (such as Pseudo- 
calanus elongatus, Acartia clausi, and Oithona similis), 
some Copepod eggs and many nauplii, a few Sagitta, 
L 
