464 TRANSACTIONS LIVERPOOL BIOLOGICAL SOCIETY. 



is not yet complete, and I hope to supplement it with 

 analyses from some other sources. It will be published 

 later on. 



Port Madoc Mussels. 11 April, 1913. 



From /Plate 1, No. of red colonies, 24 ; No. of white colonies, 



upper part of ! ,, 2 „ ,, 50 „ ,, 



in J „ 3 „ „ 80 „ „■ 



» 4 „ 77 „ ■ „ 1 



, 5 •„ „ 30 „ „ 



harbour 

 run of sewage. 



No fresh 

 water in river. 



Mean No. per mussel = 2,600. 



From 

 Gareg 

 Goch. 



Plate 1, No. of red colonies, 6 ; No. of white colonies, 

 » 2 „ „ 10 



„ 3 „ „ 12 



„ 4 „ „ 5 



„ 5 4 



Mean No. per 



= 370. 



Port Madoc Mussels. 21 April, 1913. 



Upper part of /Plate 1, No. of red colonies, 16 ; No. of white colonies, 30 



harbour in 

 run of sewage. 



Fresh 

 water in river. 



2 „ „ 21 



3 „ „ 17 



4 „ „ 12 



5 „ „ 10 



Mean No. per mussel — 760. 



24 

 14 

 15 



61 



From 

 Gareg 

 Goch. 



Plate 1, No. of red colonies, 46 ; No 



29 

 44 

 43 

 37 



Mean No. per mussel = 1,990, 



of white colonies, 

 

 4 

 4 

 



Port Madoc Mussels. 7 May, 1913. 



From 



rocks at 



Gareg Goch. 



Plate 1*, No. of red colonies, 56 ; no white colonies on any 

 ,,2 ,. ,, 50 of the plates. 



„ 3 „ „ 53 



„ 4 „ „ 20 



„ 5 „ „ 41 



Mean No. per mussel = 1,100. 



* These plates contained l/25th instead of l/50th mussel, as in the others 

 analysed. 



