236 
THE GEOLOGIST. 
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Prof, cle Koniuck further observes that out of our forty-nine Scot- 
tisli species, twenty belong exclusively to bis fauna of Vise, five only 
to that of Toumay, wbile eighteen would be common to the two, but 
that he does not know where to locate my Productus Yoxmgianus, 
Sl^irifer Carliilciensis, and LingrUa Scotica, as they have not been 
found in Belgium, nor does he know where to place the Lingula 
squamlformis, L. mytiloides, and Discina natida, so that in a general 
way some thirty-eight or forty of our species have been found at 
Vise, wliile twenty-three occur also at Toumay. 
It may likewise be observed that although some of our Scottish 
species might vie in size with those of England and Ireland, yet as a 
general rule Scottish shells of the Carboniferous period are much 
