24 



EXPLANATION OF THE FIGUEES OCCUREING IN WESTEELUND'S 

 "SIBIEIENS LAND- OCH SOTVATTEN-MOLLUSKEE ", 1877. 



By G. K. Gddk, F.Z.S. 



Bead 12th January, 1912. 



Mr attention was recently drawn to the fact tliat the treatise by 

 Westerlund entitled " Sibiriens Lund- och Sotvatten-Mollusker" 

 forming article No. 12 of Bandet xiv of Kongl. Svenska Vetensk. 

 Akad. Handl., 1877. contained no explanation of the figures on the 

 plate accompanying this article. It at once occurred to me that, when 

 several years ago I acquired a copy, I noted the omission and that no 

 reference was made in the text to these figures. I requested the 

 author to supply the missing information, and, writing under date of 

 16th September, 1900, he complied with my request, stating that the 

 explanation had been accidentally omitted. 



Under the circumstances it may be worth while to publish this 

 information for the benefit of those possessing copies. 



The Mollusca there illustrated are — 



FIG. 



1. Helix {Eulota) fnificiiiii. Miiller. 



2. H. {Eulota) Norde)iskioldi, Westerlund. 



3. II. {Trichia) Stuxbergi, Westerlund. 



4. Pupa 2'heeli, Westerlund. 



5. Succinea turgida, Linne. 



6. S. putris, var. acuta. Pf r. 



7. S. Altaica, Martens. 



8. Limncea attenuata, Say. 



9. L. lagotis, yar. patula, Westerlund. 



10. L. pereger, \a.v. producta, Westerlund. 



11. L pereger, var. torquilla, Westerlund. 



12. Physn hypnormn, xar. polans, Westerlund. 

 I'S. P. Sibirtca, Westerlund. 



14. Planorbis infralineatus, Westerlund. 



15. Valvata alieyia, Westerlund. 



16. V. Sibirica. Middendorf. 



17. Sphcermm levlnodis, Westerlund. 



18. 5. nitidum (Clessin), Westerlund. 



19. Calyciilina lacustris, var. ■^cptentrionalis (Clessin), Westerlund. 



20. Pisidium JVordenskioldi (Clessin). W(^sterlund. 



21. P. Sihiricutn (Clessin), Westerlund 



22. P. mucronatum (Clessin), Westerlund. 



23. P. boreale (Clessin), Westerlund. 



