382 Messrs. R. ]\PAnclrew and L. Barrett's List of the Mollusca 



Bbachiopoda. 



Five species of this order inhabit the shores of Norway, four 

 of which we procured abundantly, the great depth of water 

 along the coast being favourable to their numerical development ; 

 they range from 25-160 fathoms, and are generally distributed 

 along the coast, with the exception of Crania anomala, which 

 becomes extremely scarce in Nordland and is not found in Fin- 

 mark. The species are mostly gregarious, and often when a 

 haul of shells is obtained from clean ground, the specimens of 

 Brachiopoda greatly exceed the other Bivalves and Univalves in 

 number. Very few dead Terebratula were met with. 



Conchifera. 



We met with ninety-four species of this class. They are most 

 abundant on sandy and muddy bottoms. A¥e dredged off the 

 Vigten Islands one living specimen of the Lima excavata, which 

 was by far the largest bivalve met with. Among the shells 

 brought home were a few specimens which Mr. Woodward has 

 found to be identical with Limopsis pygmcea from the Crag, a shell 

 hitherto supposed to be extinct. 



