425 

 Tab. 9. 



Fig. 1. Margarita ciuera, Couth. {lim.). 



Testa inferne («), a basi {b) et superne (c) exhibita. 

 2. Machæroplax varicosa, Migh. (F). 



Testa inferne, a basi et superne exhibita. 



— 3. Machæroplax albula, Gould. ( V.). 



Testa inferne, a basi et superne exhibita. 



— 4. Machæroplax beila, Verkr. (Hm.). 



Testa inferne, a basi et superne exhibita. 



— 5. Machæroplax obaciira, Couth. ( Vr.). 



Testa inferne, a basi et superne exhibita. 



— 6. Margarita olivacea, Brown. (F.). 



Testa inferne, a basi et superne exhibita. 



— 7. Trochns occidentalis, Migh. (F.). 



Testa inferne et a basi exhibita. 



— 8. Mølleria costulata, Møll. (F.) 



Testa inferna, a basi et superne exhibita. 



— 9. Littorina palliata, Say. ( F.). 



Testa superne et inferne exhibita. 

 ' — 10. Littorina rudis, Mat. var.: grønlandica. (Vr.). 

 Testa superne et inferne exhibita. 



— 11. Hydrobia minuta. Totten. {B.). 



Testa superne et inferne exhibita. 



— 12. Onoba acideus, Gould. (Vr.). 



Testa superne et inferne exhibita. 



Tab. 10. 



Fig. 1. Cingula castanea. Møll. (V.). 



Testa superne et inferne exhibita. 



— 2. Cingida tumidula, n. (Vr.). 



Testa superne et inferne exhibita. 



— 3. Alvania Jeffreysii, Waller. (Vr.). 



Testa superne et inferne exhibita. 



— 4. Alvania cimicoides, Forb. (L.), 



Testa superne et inferne exhibita. 



— 5. Alvania abyssicola, Forb. (L.\ 



Testa superne (a), inferne (b) et a latere dextro (c) ex- 

 hibita. 



— 6. Alvania purictwa, Mont. (L.). 



Testa superne et inferne exhibita. 



