110 TRANSACTIONS LIVERPOOL BIOLOGICAL SOCIETY 

 NOTES- 



[The first of the following six charts of the more 

 restricted area of Port Erin Bay (on a larger scale, about 

 seven inches to the mile), shows the physical features, 

 the soundings, and the nature of the bottom. In this, 

 as well as in the other five, are inserted the principal 

 contours of depth, and also a series of magnetic north and 

 south and east and west lines dividing the area into 

 twenty squares, each measuring about TOO feet to the side. 

 The positions of the lines are determined by prominent 

 objects on the shore, which will be easily recognised, and 

 as the vertical and horizontal columns are lettered and 

 numbered, anyone with a little practice, when boating in 

 the bay, will be able to determine in most cases what 

 square he is in. The squares should be quoted by letter 

 and numeral, and will soon become familiar to workers 

 at the Station. Eor example, the Biological Station 

 itself lies opposite square C.3, the Traie Maenagh 

 swimming bath is in A.l, the small boat jetty in B.3, 

 and the buoy at the entrance to the bay is at the junction 

 of four squares. 



The remaining five charts deal each with one or more 

 oi the chief groups of animals.] 



