SHELLS. 399 



T. sordida, Couthouy. 

 T. calcarea, Lyell. 

 Sanguinolaria sordida, Gould. 



PANDORINA (Scacchi). 



P. arenosa, Moller, Ind. Moll. Groenlandise, p. 20. 

 Hob. Port Refuge. 



SAXICAVA (Fleurian). 



8. rugosa, Linnaeus (Mytilus), Syst. Nat. (12th edit.) 

 p. 1156. 



Saxicava distorta, Gould. 



MYA (Linnseus). 

 M. truncata, Linnaeus, Syst. Nat. (12th edit.) p. 1112. 



HYPOTHYRIS (Phillips). 



H. psittacea, Chemnitz (Anomia), Conch. Cab. vol. viii. p. 

 106. pi. 78. f. 713. 



Terebratula psittacea, Lamarck. 



Hob. Principally Northumberland Sound, attached to rocks 

 at a depth of thirty-three fathoms. 



