322 



Canndian Record of Science. 



i 



and sillily limestone. It is also m cliaracteristic Hritish 

 species. 



KiR. 8, X a. 



2. Carhonia haird hides, J. & K. (Fig. 8.) Less 

 almndant than the preceding, at the Joggins and also 

 at Mabou, where it was collected along with the preceding 

 by Mr. Foord, but it is abundant in the Upper Coal 

 Formation of Smelt Brook, East Itiver, Pietou. It is also 

 a common Scottish species. 



Fig. 9, X 25. 



3. Gandona elotigata, J. & K. (Fig. 0.) Larger and more 

 elongated than the preceding forms, but much less abun- 

 dant. It attains the length of -j\fth of an inch. 



Prof. Jones has some interesting remarks on the very 

 wide distribution oi all these species in the Northern 

 Hemisj)here, in connection with the fact that they were 

 probably shallow-water, or even brackish -water species. 

 This indicates means of transit for such animals, by shallow 

 areas either now oceanic or now land. It concurs with 

 many other facts in showing that the comparative 

 rarity of great ocean depths and high mountain ranges 



