FAUNA AND FLORA OF NORFOLK : NON-MARINE MOLLUSCA. 78 j 
Oscillatoria TENUis, Ag. Common. 
,, nigra, \ auch. Common. 
,, limosa, Ag. Common. 
Nostoe sph.ericum, Vauch. ( U . pisiformis). Bradwell 
O. B. G. 
,, cceri leum Lyngb. Ixworth, Thorpe. 
,, commune, Vauch. Common. 
,, pruniforme, Ag. Belton. Common, near Yar- 
mouth, O. B. G. 
>> microscopicum, Carm. Cavenham Heath. 
Gloiotrichia natans, Ag. Belton Common. 
XIV. 
FAUNA AND FLORA OF NORFOLK. 
The Non-Marine Mollusca of Norfolk. 
By A. Mayfield. 
Read 26th February , 1909. 
Several years have now elapsed since the last list of Norfolk 
non-marine Mollusca was published, during which time much 
advance has been made in our knowledge of British 
Conchology : new species have been discovered, many that 
were once considered rare have proved on close research to 
be fairly common, and improvements have been made in the 
nomenclature. 
