1898-1902. No. 28. 1 THE CAMBRO-ORDOVICIAN BEDS. 



11 



In addition to the forms mentioned here we have some others, 

 brachiopodes, gastropodes, trilobites etc, where the material before us 

 has been too incomplete for determination. 



The vertical extent of these forms as known from other regions of 

 North America is as follows: 



We have here a typical Trenton fauna with a series of the charac- 

 teristic forms of this division, besides some which are found in 

 considerable vertical extent. The fauna exhibits an extremely close 

 agreement with that described by SCHUCHERT from Silleman's Fossil 

 Mount in Baffin Land, ! which again with its 72 species lies very close 

 to the Galena fauna in Minnesota, Iowa, and Wisconsin. 



Norman Lockyer Island was visited by Sir GEORGE NARES'S expe- 

 dition, and in the account given by Feilden and De Ranee (p. 558), 

 Favistella (Columnaria) reticidata Salter is mentioned from there. 



According to SCHEI the limestone from Norman Lockyer Island 

 recurs on the north side of the Princess Marie Bay : 



"The same limestone, with the same fossils, occurs again at the 

 foot of Gape Harrison, where however it is overlain by thick beds of 

 limestone, calcareous sandstone, quartz sandstone, and on top of all a 



1 On the lower Silurian (Trenton) Fauna of Baffin Land. Proc. U. S. Mus. 

 XXII 1900. 



