MEMOIRS 
OF THE 
WERNERIAN 
NATURAL HISTORY SOCIETY, 
FOR THE YEARS 1826-31. 
VOL. VI. 
WITH SIX ENGRAVINGS. 
EDINBURGH 
ADAM BLACK, NORTH BRIDGE, EDINBURGH; 
AND LONGMAN, REES, ORME, BROWN & GREEN, 
LONDON. 
MDCCCXXXIL 
