SEA-FISHERIES LABORATORY. 181 



over the Church Scar Mussel Bed about a mile below 

 Lytham. At St. Annes the sewage is discharged not far 

 from the Mussel Bed.- and flows with the ebb tide over it. 



In the Mersey five sewers discharge about the 

 Egremont Mussel Bed, one on to the bed, and the other 

 four — although the pipes have been carried down to low 

 water — discharge close to the bed and in fact over that 

 portion which does not come adry. A few Mussels are at 

 times also taken near the sewer mouth at Rock Ferry. 

 The Wallasey Bed lies some distance below the sewer 

 outlet at New Brighton. 



At Bhyl very few Mussels are taken. In the Conway 

 river there are valuable Mussel Beds. The principal beds 

 lie a considerable distance below the sewer outlets ; but 

 Mussels are found and taken near the Deganwy sewer 

 outlet, and also not far from the Conway sewer outlet. 

 Opposite Deganwy, and in the Channel, a large strike of 

 Mussels has taken place which extends along the opposite 

 side of the river for a considerable distance, both up and 

 down stream. 



At Portmadoc the main sewer empties into an open 

 ditch or stream about 1,000 yards above the harbour, and 

 then flows on through the harbour down channel seawards. 

 There are also two smaller sewers, one which empties into 

 the harbour and the other just above it. Mussels are 

 taken in the harbour and in different parts of the channel 

 over which the sewage and stream together flow. Mussels 

 are also taken from the scars which lie to the south of the 

 harbour. At Barmouth the sewage is discharged a con- 

 siderable distance below two of the beds. The third bed is 

 situated opposite the sewer outlet, but on the south side of 

 the river — the sewage being discharged on the north side. 

 In the Dovey, the Aberdovey sewage outfall enters the 

 main stream about 220 yards below a Mussel Bed, and 650 



