192 PROF. W. A. HERDMAN ON THE DISTRIBUTION 
In 1913 the numbers were lower, and the maximum was 4000 on 
July 28th. 
In 1914 the maximum was 7320 on August 6th. 
In 1915 again the numbers were low, the highest being 3232 on July 1st. 
In 1916 a swarm appeared in the bay on July 11th, when over 12,000 
were taken in a haul. A few days before a similar haul gave only 10 
specimens, and a few days after 200. The average per haul at Port Erin 
over the ten years is only 266. 
On the whole this record agrees well with that at Plymouth, which is 
* Common on and off from the end of April to the beginning of November, 
generally present in small numbers at other times” (Miss Lebour). 
Fic. 13.— Calanus finmarchicus, from a photo-micrograph by A. Scott. 
Calanus finmarchicus (fig. 13), as its specific name suggests, is a northern 
or Scandinavian form with a wide distribution through the colder waters of 
the North Atlantic. According to Ove Paulsen its home and centre of dis- 
tribution lies te the south of Iceland. 
In Loch Fyne on the west coast of Scotland, off Skate Island, Calanus 
appears to be present throughout the year in great quantities, in deep water, 
at or near the bottom, along with Jucheta norvegica and Nyctiphanes 
norvegica. For example, in July 1907, off Skate Island in 104 fathoms, we 
eaught 13,000 Calanus in one vertieal haul, and on another occasion off 
East Loch Tarbert, in 76 fathoms, we got 10,000. We have also obtained 
