272 
Part III, — Eighth Annual Report 
Clausia elongata, Rhinocalanus gigas, Heterochxta spinifrons, Metridia 
armata, Candace pectinata, Acartia discaudatus, Ectinosoma atlantica, 
Idia furcata, and Monstrilla danae. It has to be remembered, however, 
that they have only been glanced at for a comparatively short time. The 
somewhat monotonous continuance of the same species throughout the 
year is a marked feature in the inquiry, and this was likewise brought 
out during the trawling expeditions. Though Copepods are sometimes 
very abundant in the Bay, they are, so far as I could judge from the 
spirit-preparations made under Dr John Murray, apparently in greater 
profusion in the area of the estuary of the Clyde. Moreover, they appear 
in large numbers earlier in the year. 
It must not be considered that the following remarks on the periods of 
appearance and disappearance of the species have greater importance than 
belongs to the simple record of a year. 
Calami* finmarchicus, Gunner. 
Mid- Water-Net 
First appearance. — 24th January, many. 
Last appearance. — 18th December. 
Most plentiful. — Found not unfrequently in January, February, and 
March, but at other times of rare occurrence. 
Bottom-Tow- Net. 
First appearance. — 24th January. 
Last appearance. — 18th December. 
Most plentiful. — In December, many, as a rule, each time. In January, 
February, and March got almost every time the nets put down, 
otherwise not very common. 
Surface-Tow-Net. 
First appearance. — 21st February, very few. 
Last appearance. — ISth October, very few. 
Most plentiful. — A few times at beginning of year. During rest of year 
very scarce. 
This is one of the most abundant species, not only in the waters of the 
pay proper, but far beyond it, and at a considerable depth as well as in 
the upper regions of the water. It is cosmopolitan in its range so far as 
the northern waters are concerned, apparently being as abundant in the 
Arctic Seas, where it is said to constitute in part the food of the whale, 
as off our own shores, where it enters largely into the food of the post-larval 
fishes. It is chiefly this species which tints, of a delicate pinkish hue, 
the translucent abdomen of the little fishes. Calanus finmarchicus is less 
abundant in the Baltic than in the North Sea, 
Pseudocalanus elongatus, Boeck. 
Bottom-Tow-Net, 
First appearance. — 13th February. 
Last appearance. — 10th December, numerous. 
Most plentiful. — In September and December, especially in latter month. 
Not unfrequently procured, January, February, and March. By 
no means so common as Balitemora longicoriiis. 
Surface-Tow-Net. 
First appearance. — 13 th February. 
Last appearance. — 30th October. 
This form occurred very seldom in the net. 
