174 BIOLOGICAL SURVEY OF 



Amnicolidae 

 Paludestrina d 'Orbigny 

 Paludestrina minuta (Totten) 



Rissoidae 

 CiNGULA Fleming 

 CiNGULA CARiNATA Migliels and Adams 



CiNGULA CASTANEA (Moller) 



CiNGULA ARENARiA Mighels and Adams 



CiNGULA AREOLATA (StimpSOn) 



Onoba Adams 

 Onoba aculeus (Gould) 



Skeneidae 

 Skenea Fleming 

 Skenea planorbis (Fabricius) 



Litorinidae 

 LiTORiNA Ferussac 

 LiTORiNA LiTTOREA (Linne) 



LiTORINA OBTUSATA PALLIATA (Say) 



LiTORiNA RUDis (Donovan) 



LiTORINA RUDIS TENEBROSA (Montagu) 



Lacuna Turton 

 Lacuna vincta (Montagu) 

 Lacuna vincta fusca (Gould) 



Turritellidae 

 Turritella Lamarck 

 Turritella EROS a Couthouy 



TuRRiTELLOPSis G. 0. Sars 

 Turritellopsis acicula (Stimpson) 



Trichotropidae 

 Trichotropis Broderip 

 Trichotropis borealis Broderip and Sowerby 



