150 PROCEEDINGS OF THE NATIONAL MUSEUM. 



UTiCA SPECIES— continued. 



[" Flinty bituminous limestone." ?Jones Cape.] 



Cyphaspis frobisheri Emerson. 



TRENTON SPECIES — continued. 



["Gray argillaceous limestone." ?Cape Stevens.] 



Tentaculites. 

 Leperditia alta Conrad. 

 Leper ditia canadensis Jones. 

 Primitia muta Jones. 

 Frimitia frobisheri Emerson. 

 Beyrichia symmetricus Emerson. 

 Asaphus sp. 



The Trenton horizon may be the same as that of Silliman's Fossil 

 Mount. In any event, the foregoing lists indicate horizons intimately 

 connected, and it is probable that all the fossiliferous strata at the head 

 of Frobisher Bay are of Trenton and Utica age. 



AkpatoTc Island. — The fossils collected by Dr. Bell on Akpatok Island 

 have been studied by Professor Whiteaves/ with the following results : 



The species indicate the Trenton limestone, and "are remarkably 

 similar to the fossils of the Trenton formation of the Red River Valley 

 in Manitoba." " Eleven had previously been found in the Manitoba 

 Trenton, and nine are species that are common at East Selkirk and 

 Lower Fort Garry." This fauna also connects directly with that of 

 Silliman's Fossil Mount. 



The following is a list of the species: 



Beceptaciilites oiveni Hall. 



Streptelasma robustum Whiteaves. 



Calapoecia canadensis Billings. 



Rafinesquina lata Whiteaves. 



Leptcena unicostata (Meek and Worthen). 



Plectambonites sericea (Sowerby). 



Orthis tricenaria Conrad. 



Ortliis (Dinorthis) meedsi arctica Schuchert. 



Orthis (Hebertella) bellirugosa (Conrad). 



Orthis {Balmanella) testudinaria (Dalman). 



Platystrophia biforata (Schlotheim). 



f Rhynchotrema incequivalvis (Castelnau). 



Cyrtoceras manitobense Whiteaves. 



1 Amer. Journ. Sci., 4tli ser., VII, 1899, pp. 433, 434, 



