FOSSILS OF DEVONIAN ROCKS. 



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several other Brachiopods, among which are two small 

 species of Productus. 



Fossils from Snake Island. 



a, Orthis Iowensis (Hall) side view. 



b, Lucina occidentals (Billings). 



c, do. do. Outlines of same, side view. 



d, Lvcinn elliptica ( Conrad). 



e, Loxonema nexilis ? 



The Lamellibranchiate shells are Lucina elliptica (Con- 

 rad) a species of the Corniferous limestone and Hamilton 

 groups of Canada and New York, and a new species of 

 the same genus, which I propose to call L. occidentalis. 



Of Gasteropoda there are two species of Luomphalus, 

 and a fragment of a Loxonema, most probably L. nexilis. 



The Cephalopoda consist of fragments of Orthoceras, 

 Gomphoceras and a species of Nautilus or Gyroceras. 



Although we have none of the characteristic spirifers, 

 corals, or trilobites to guide us, yet I think that upon the 

 evidence of the above fossils we can safely say that this 

 locality is Devonian, and most probably about the age of 

 the Hamilton group. 



The fossils from Manitobah Island are mostly the 

 same as those of Snake Island, with the addition of two 



