480 TRANSACTIONS LIVERPOOL BIOLOGICAL SOCIETY. 



Estuary of the Wyre. 



23 February, 1911. 



Sample of mussels from the Estuary near Wyre 

 Dock. 



Five mussels emulsified in 250 cc sterile water. 



1 cc. of emulsion = * 



(0-02 mussel) contained 2 intestinal bacteria. 

 1 

 1 

 Mean No. of intestinal bacteria per mussel = 66. 



9 March, 1911. 



Sample of mussels taken from near Wardley's. 

 Five mussels emulsified in 250 cc. sterile water. 



1 cc. of emulsion = 



(0-02 mussel) contained 3 intestinal bacteria. 



2 



3 



4 



Mean No. of intestinal bacteria per mussel = 125. 



5 November, 1912. 



Sample of mussels from the Estuary near Wyre 

 Dock. 



Five mussels emulsified in 250 cc. sterile water. 



1 cc of emulsion = 



(0-02 mussel) contained 48 intestinal bacteria. 

 31 

 34 

 31 

 23 

 Mean No. of intestinal bacteria per mussel = 1650. 



5 November, 1912. 



Sample of mussels from the channel near Wardley's. 

 Five mussels emulsified in 250 cc of sterile water. 



1 cc of emulsion = 



(0-02 mussel) contained 7 intestinal bacteria. 



16 



20 



9 



10 



Mean No. of intestinal bacteria per mussel = 600. 



