36 



THE GEOLOGIST. 



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Prof, de Koninck further observes tliat out of our forty-nine Scot- 

 tish species, twenty belong exclusively to his fauna of Vise, five only 

 to that of Tournay, while eighteen would be common to the two, but 

 that he does not know where to locate my Produchis Yoimgiaims, 

 Spirifer Carhih'cnsis, and Lingula Scotica, as they have not been 

 found in Belgium, nor does he know where to place the Lingula 

 sqnamiform'is, L. viytiloides, and Discina natida, so that in a general 

 way some thirty-eight or forty of our species have been found at 

 Vise, while twenty-three occui' also at Tournay. 



It may like-\\4se 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 



