MARINE BIOLOGICAL STATION AT PORT ERIN. 41 



Station during the next few seasons will take a salutary 

 pride in demonstrating our omissions, and so gradually 

 fill up the gaps in our present knowledge of the popula- 

 tion of the sea-bottom. 



We submit then for criticism and completion : — 



1. A chart of the south-west corner of the Isle-of- 

 Man, the wider area in which we often dredge from Port 

 Erin in rowing and sailing boats. This extends from 

 Fleshwich Bay on the north to Spanish Head on the south, 

 and takes in the Calf Sound and the rich dredging ground 

 oif Bay Fine and Half-way Rock. This chart is on a 

 smaller scale than those that follow, about 1J inch to the 

 mile. The numbers refer to the names of the species 

 in the list given in the explanation of this Plate I. 



2. A series of six charts of the more restricted area 

 of Port Erin Bay, on a larger scale, about 7 inch to the 

 mile. The first of these (PL II.) shows the Physical 

 features, the soundings, and the nature of the bottom. 

 In this, as well as in the following five charts, we have 

 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 700 feet to the side. The positions of the lines 

 are determined by prominent objects on the shore, which 

 we believe will be easily recognised, and as the vertical 

 and horizontal columns are lettered and numbered, we 

 think that 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. For example, the Station itself lies opposite 

 square A.2, 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 



