C 
=~] 
These represent : — 
ies 
5O 
Samples of the sea bottom at and about the 
* Deposit buoy.” (See map on page 46). 
. Samples of the sea bottom near the Rock Channel 
(No. 7 buoy). 
. Samples of the deposit found in gutters on the 
edge of the Burbo Bank at low tide. 
. Material taken from a ‘ Hopper” in the Man- 
chester Ship Canal. 
. Samples of shrimps caught near the Deposit buoy. 
. Samples of young flat fish caught near the 
Deposit buoy. 
“These have all been carefully examined in the Sea- 
Fisheries Laboratory, and microscope preparations of the 
various substances have been made and compared. 
The examination has shown : — 
be. 
20 
4°. 
That there is comparatively little fine mud or 
dirty material at the Deposit buoy. The 
bottom appears to consist largely of coarse 
crystalline sand. 
. At No. 7 buoy the deposit is dirtier, and has 
more mud and amorphous decomposing 
material. 
In the gutters at low tide the deposit is also 
dirtier than at the Deposit buoy, and more 
like the refuse from the Hoppers. 
The material from the Hopper was very dark 
coloured, and had much more yellow and black 
amorphous decomposing stuff than is found on 
the sea bottom at or near the Deposit buoy. 
. The shrimps caught about the Deposit buoy con- 
tained in the stomachs—sand, vegetable tissue, 
animal debris, legs, &c., of small Crustaceans, 
