144 TRANSACTIONS LIVERPOOL BIOLOGICAL SOCIETY. 
(2) Seven gatherings taken around Arran. 
(3) Eight gatherings off Skate Island at the entrance 
to Loch Fyne. 
(4) Six gatherings in Upper Loch I*yne. 
II—The series North of Cantyre were mostly taken 
from between Oban and Skye. The gatherings can be 
arranged under the following localities : — 
(5) Half-a-dozen from the Firth of Lorn and neigh- 
bourhood. 
(6) Six from the Northern end of the Sound of Mull. 
( 
7) Hight from around the Small Isles and the Sea of 
the Hebrides. 
(8) Eight from Loch Nevis and Loch Hourn, Sound 
of Sleat. 
(9) Ten from the Sound of Raasay, North of Skye. 
IlI.—All the 66 deep hauls in the Irish Sea 
‘ were from one locality, 12-16 miles N.N.W. of Port 
Erin, Isle of Man, from depths of 59 to 73 fathoms. 
When we examine these groups of Scottish 
gatherings from the same places in different years, two 
conclusions become evident :— 
(A) That localities, in some cases not very far apart, 
differ very considerably in the nature of their 
plankton at the same time of the year; 
(B) That there is a constancy year after year in the 
nature of the plankton at some localities. 
A few examples will make this clear : — 
In regard to (A), in the Northern area (North of 
Oban) the hauls taken in Loch Hourn and Loch Nevis, 
off the Sound of Sleat, are on all occasions different in 
