436 



Fig. 6. Riosoa inconspirMa, Aid. var. '2. (Hs.), 

 Testa inferne exhibita. 



— 7. Aporrhais serresiana, Mich. (Norv. occident.). 



Testa superne et inferne exhibita. 



— 8. Aclis eæigua, n. (L.). 



Testa inferne exhibita. 



— 9. Scalaria obiusicostata, Wood. ( V.). 



Testa inferne et a basi exhibita. 



— 10. Odostomia turrita, Mont. (L.). 



Testa inferne exhibita. 

 - 11. Odostomia acuta, Jeffr. (L.). 

 Testa inferne exhibita. 



— 12. Odostomia pallida, Mont. (B.). 



Testa inferne exhibita. 



— 13. Parthenia eæimia, Jeffr. ; var. elongata. (Hm.). 



Testa inferne exhibita. 



— 14. Parthenia interstincta., Mont. (Z/.). 



Testa inferne exhibita. 



— 15. Eulimella compactilis, Jeffr. (L.). 



Testa inferne exhibita. 



— 16. Eulimella ventricosa., Forb. (L.). 



Testa inferne exhibita. 



— 17. Tracht/sma delicatum, Phil. ; var. expansa. (L.). 



Testa inferne et a basi exhibita. 



— 18. Trachysma delicatum, Vhil.; forma typica, (Z/.). 



a— b — c. testa inferne, a basi et superne exhibita; d. 

 pars testæ fortiter aucta, sculpturam ostendens. 

 -- 19. Ådeorhis fragilis, n. (L.). 



Testa inferne, superne et a basi exhibita. 



— 30. Omalaxis supranitida, Wood. (-£/.). 



Testa a vertice, a basi et inferne exhibita. 



— 21. Homalogyra atomus, Phil. (V.). 



Testa a vertice, inferne et a basi exhibita. 



Tab. 23. 



(Testa in figuris omnibus inferne exhibita). 



Fig. 1. Scalaria grønlandica, Chemn. ; var. crebricosiata. (F.). 

 — 2. Claihurella linearis, Mont. (L.). 



