152 



TRANSACTIONS LIVERPOOL BIOLOGICAL SOCIETY. 



Mussels from Aberdovey (24.6.1913). Mean number of sewage 

 bacteria per mussel = 20,000. The characters of 10 

 organisms were as follows : — 





& 



o 



© 



m 

 O 



o 

 cS 



y1 



si 



O 



©' 



P 



©" 



•1 



o 



1 



M 



© 



■a 



© m 



>> 



43 



°43 

 O 



©' 



1 

 O 



Morphology. 



1 



+ 



+ 



_ 



_ 



_ 



_ 



+ 















Short bacilli. 



2 



+ 



« 



a 



— 



— 



— 



+ 



_ 



+ 



+ 



Bacilli. 



3 



+ 



+ 



+ 



— 



+ 



— 



— 



+ 



— 







Long bacilli. 



4 



+ 



+ 



— 



— 



— 



— 



+ 



_ 



_ 







Short bacilli. 



5 



+ 



+ 



+ 



- 



+ 



- 



+ 



- 



— 



(J 



Moderately long bacilli. 



6 



+ 



a 



a 



— 



— 



— 



+ 



— 



+ 



+ 





7 



+ 



+ 



+ 



a 



+ 



a 



+ 



_ 



_ 



q 



Short bacilli. 



8 



a 



a 



a 



- 



- 



- 



+ 



- 



+ 







Moderately long bacilli. 

 Very long bacilli. 



9 



+ 



+ 



+ 



— 



+ 



— 



+ 



— 



— 







10 



+ 



+ 



+ 



- 



+ 



a 



- 



+ 



- 







Moderately long bacilli. 



Mussels from Barmouth (22.7.1913). Mean number of sewage 

 bacteria per mussel = (a) 2,420, (b) 6,200. The characters 

 of 14 of these organisms are as follows : — 









& 











T3 . 















&D 











S* 











© 



+3 

 3 



h-3 



S3 

 © 



o 



© 



43 



"o 



ft 



© 

 "3 



o 

 <3 



1 



©* 

 'o 

 c 



1—1 



© M 



1 



■43 



1 



a 

 ""§ 

 O 



Morphology. 



1 



+ 



+ 



_ 



_ 



_ 



_ 



+ 



_ 



_ 







Bacilli. 



2 



+ 



+ 



+ 



— 



— 



— 



+ 



— 



— 







)t 



3 



+ 



+ 













+ 



_ 







Long slender bacilli. 

 Bacilli. 



4 



+ 



+ 



+ 



_ 



+ 



— 



+ 



— 



_ 







5 



+ 



+ 



+ 



a 

















Long slender bacilli. 



6 



+ 



+ 



+ 



— 



+ 



— 



— 



— 



— 







Bacilli. 



7 



+ 



+ 



+ 



+ 



+ 



- 



+ 



- 



~ 







j* 





(a) Nos. 



1 to 7 are 



from Trwyn y Gwaith. 







8 



+ 



+ 



+ 



+ 



— 



— 



+ 



— 



+ 









9 



— 



+ 



+ 



— 



+ 



— 



+ 



— 



+ 









10 



+ 



+ 



— 



— 



— 



— 



+ 



— 



— 









11 



+ 



+ 



+ 



— 



+ 



— 



— 



— 



— 









12 



+ 



+ 



+ 



— 



+ 



— 



+ 



— 



— 









13 



+ 



+ 



+ 



+ 



— 



— 



+ 



— 



+ 









14 



+ 



+ 



+ 



+ 



+ 



— 



+ 



+ 



+ 



+ 





(6) Nos. 8 to 14 are from Aberamffra Harbour. 



