358 TRANSACTIONS LIVERPOOL BIOLOGICAL SOCIETY. 



which are most exposed to sewage pollution. If such 

 action should be decided upon, marks delimiting the 

 proposed closed area could easily be selected. By far the 

 greater portion of the mussels sent to the markets are 

 taken from below Deganwy, and the closing of the upper 

 beds would not be a real hardship. 



The Conway Sewerage System. 



The positions of the principal sewers are shown on 

 the sketch chart (reduced from one marked by Mr. 

 Delamotte). Seven outfall sewers open into the Conway 

 river between Llandudno Junction and the Ferry. Nos. I. 

 and II. discharge the sewage produced in Conway itself. 

 Nos. III. and IV. supply a small group of houses, 

 including the Conway Union Workhouse, at Morfa, 

 opening into a small stream which flows over a mud flat, 

 and opens into the channel at Bodlondeb Point. On the 

 Deganwy side there are two sewer outfalls. No. V. is 

 situated to the North of the Pier. This outfall formerly 

 terminated some distance above low-water mark, and, as 

 it was producing a nuisance, Dr. Eraser recommended that 

 the pipe should be carried further into the channel, and 

 this has now been done. No. VI. serves Tywyn and opens 

 on the sands some distance above low-water mark. At its 

 extremity the sands are rather foul. No. VII. serves the 

 neighbourhood of Llandudno Junction. It is a large and 

 fairly important outfall, which opens into a little stream 

 which runs over the mud flat South of the London & North 

 Western embankment, and opens into the river 

 immediately above the Bridge. It is carried down some 

 distance from the shore, but terminates far above low- 

 water mark. The stream itself is very foul, and the mud 

 on either side of it is not much better. The mud is very 

 soft, and immediately beneath the surface is black and 



