120 C. A. Wcsterlund, Synopsis Molluscorum Exlramarinor Scandin. 



nuis; lat. 5 mm. — Dania in SJLclland (Faarup So "■ ad 

 Veile: H. L.). 



**) T. subtus concava. 



Pl. socius W. (Ofvers. K. Vet. Ak. Forh., 1881). T. clathrala, 

 tenuis, virescenti-cornea; anfr. 4, ultimus superne obtuse 

 angulatus, extus depressus, peripheria compresso-rotunda- 

 tus, subtus convexus, antice descendens; apertura perobli- 

 qua, rotundato-ovalis, marginibus tenue junctis. Lat. 4 — 



Hab. Succia in Skane (Ortofta), Blekinge (Ronneby, in ri- 

 vulo ad Torneryd *), Roslagen (Soderby: P. de L.), Soderman- 

 land (Dalbyo: E. N.), Stockholm (Alviken: J. W.), Helsing- 

 land (Arbro: E. C). 



Pl. arcticus Beck (Index Moll., 1837). T. non clathrata, corneo- 

 flavida v. albida; anfr. 3V2> celerrime accrescentes, con- 

 vexi, sutura canaliculata, ultimus rotundatus, obsoletissime 

 angulatus; apert. obliqua, hippocrepiformis, marginibus 

 callo albojunctis. Lat. 5 mm. 

 Hah. Suecia \n Pite Lappmark (ad Jorn: E. H.) et in Jemt- 



land (ad Ostersund: E. N,). — Norv. in Tromso stift. — Fen- 



7iia in lacuna ad Kuopio (Mus. Helsingf.). 



ff Spira sat magna; anfractus sat irregulariter accrescentcs, 

 ultimus magnus, sed non dilatatus. 

 *) T. non V. ohsolete clathrata. 



Pl. stromi W. (Ofvers. K. Vet. Ak. Forh., 1881). T. firma, ru- 

 fobrunnea, utrinque subplana, medio impressa, den.se stri- 

 ata; anfr. 4^2, penultimus antepenultimo triplo latior, ul- 

 timo Ys angustior, ultimus compressus, medio obsolete an- 

 gulatus (interdum membrana pra?ditus); apertura perobli- 

 qua, rotundato-ovalis, marginibus callo forti, interdum so^ 

 luto, conjunctis. Lat. Vy.^ — 8 mm. 



Hah. Suecia in Wermland (ad Carlstad) et in Lappland 



sparsim. — Norv. ad Eker (in Rokkebjergstjern). — Fennia in 



Osterbotten (Uleaborg et Nuottasaari) et ad Kittila in Lappland 

 (Mus. Helsingf.). 



