1911] PORTLANDIA ARCTICA GRAY 11 



Pecten striatus Mull. 



Nucula nucleus L. 



Cardium edule L. 



Cardium fasciatum Mont. 



Isocardia cor. L. Very common. 



Timoclea ovata Penn. 



Lucinopsis undata Penn. 



Lucina borealis L. 



Montacuta bidentata Mont. 



Macoma fabula Gronov. 



Thracia truncata Brown, var. devexa G. 0. Sårs of a 

 special variety very similar to var. convexa Wood, of the same 

 type as that described by me on a former occasion from the 

 brick-work of Tangen in the Stjørdal of the Trondhjem district 1 . 



Neaera cuspidata Olivi. 



Corbula gibba Olivi. Numerous. 



Scutellina fulva Mull. Length 8 mm. 



Emarginula fissura L. 



Capulus hungaricus L. 



Lunatia intermedia Phil. 



Littorina littorea Lin. 



Lacuna pallidnla da Costa. 



Onoba proxima Ald. 



Onoba vitrea Mont. 



Alvania jeffreysii W aller. 



Alvania reticulata Mont. 



Alvania cimicoides Forb. 



Alvania punctura Mont. 



Alvania zetlandica Mont. 



Rissoa interrupca Ad. 



Bissostomia membranacea, var. octona L. 



Turritella terebra L. 



Bittium reticulatum da Costa. Numerous. 



1 P. A. Øyen: Kvartær-studier i Trondhjemsfeltet, 11(1911), pp. 136, 137. 



