120 C. A. Westerhmd, Synopsis Molluscorum Extramarinor Scandin. 



nuis; lat. 5 mm. — Daiiia in Sji^'lland (Faarup So* ad 

 Veile: H. L.). 



**) T. suhtus concava. 



PI. socius W. (Ofvers. K. Vet. Ak. Forh., 1881). T. clathrata, 

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

 angulatus, extus depressus, peripheria compresso-rotunda- 

 tus, subtus convexus, antice descendens; apertura perobli- 

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



Hob. Siiecia 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). 



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

 flavida v. albida; anfr. 372^ celerrime accrescentes, con- 

 vexi, sutura canaliculata, ultimus rotundatus, obsoletissime 

 angulatus; apert. obliqua, hippocrepiformis, marginibus 

 callo albojunctis. Lat. 5 mm. 



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

 land (ad Ostersund: E. N.). — No7^v. in Tromso stift. — Fen- 

 nia in lacuna ad Kuopio (Mus. Helsingf.). 



ft Spira sat magna; anfracUis sat irregulariter accrescentes, 

 ultimus magnus, sed non dilatatus. 



*^ T. non V. obsolete clathrata. 



PI. strbmi W. (Ofvers. K. Vet. Ak. Forh., 1881). T. firma, ru- 

 fobrunnea, utrinque subplana, medio impressa, dense stri- 

 ata; anfr. 4Y2, penultimus antepenultimo triple latior, ul- 

 timo Ys angustior^ ultimus compressus, medio obsolete an- 

 gulatus (interdum membrana pracditus); apertura perobli- 

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

 luto, conjunctis. Lat. l^/^ — 8 mm. 



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

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

 Osterbotten (Uleaborg et Nuottasaari) et ad Kittila in Lappland 

 (Mus. Helsingf.). 



