200 III^LIX §. 42. 



519. H. Vancouvcrcnsis Lca. 



T. lale unibilicata, orbiculato - depressa , solidiuscula, n»inu- 

 lissinie et confertini striata et rugulosa, olivaceo-cornea; spira vi\ 

 elevata; anfr. 4 — 4/4 planiusculi, sensini accresccntes, ultimus 

 basi subconipressus, antice deflexus; apertura perobliqua, sub- 

 circularis; perist. superne depressum, simplex, basi incrassatum, 

 breviter reflexum, marginibus approximalis. — R. a. = 3 : 4. — 

 Diam. maj. 31 , min. 26, alt. 14 mill. (Coll. Nr. 302.) 

 Helix Vancouvei^e7isis Lea obs. II. p. 87. t. 2 3. f. 72. 



— — Pfr. Symb. II. p. 41. 



— — Chemn. ed. II. Helix N. 59 6. t. 04. f. 2 I —23. 



Habitat in America boreali, frecjuens in ri[)is fluvii Columbia- 

 River, Oregon, 



520. H. Sinclairi Pfr. 



T. late umbilicata, depressa, tenuis, regulariter et confertim 

 costulato-striata, fulvo-flava, lineis rufis interruptis multifasciata ; 

 spira subplanulata; anfr. 4 planulati, sutura levi disjuncti, cele- 

 riter accrescentes, ultimus depressus, antice valde deflexus; aper- 

 tura perobliqua, lunato-ovalis; perist. simplex, marginibus ap- 

 proximatis, dextro recto, columellari obliquo, breviter reflexo, 

 calloso. — Diam. maj. 17, min. 15, alt. 7^2 mill. (Spec. Mus. Britt.) 



Helix Sinclairi Pfr. in Zeilschr. f. Mal. 18 43. p. 134. 

 Habitat in Van-Diemensland (Dr. Sinclair). 



5*21. H. planorboidcs Rafincsquc. 



T. iHte umbilicata, depressa, superne laeviuscula, basi costu- 

 lalo-striata, diaphana , corneo-flavida; spira brevissima; sutura 

 mediocris: anfr. 5 planiusculi, ultimus antice non deflexus; aper- 

 tura vix obliqua, lunato-circularis; perist. simplex, marginibus 

 approximatis, basali reflexiusculo. — Diam. maj. -14, min. 12, 

 alt. 6'/a mill. (Coll. Nr. 303.) Alia specim. majora. 

 Mesomphix 'planorboides liafin. (teste Fer.) 

 Helix planorboides (Helicella) Fer. pr. 211. Hist. t. 82. f. 4. 

 _ _ pfr. Svmb. II. p. 37. 



_ _ Chem7i. ed. H. Helix N. 608. t. 95. f. 17— I 9. 



— concava Say in Philad. journ II. p. 159. 



— — Binn. in Bost. journ. III. p. 372. t. 14. 

 Circinaria planorboides Beck md. p. 2 4. 



Habitat in America boreali: lllinois et Missouri. 



522. H. coactiliata Fcrussac. 



T. lale umbilicata, depressa, subdiscoidea , tenuis, sub lenle 

 minutissiinc granulato-striata , haud nitens , pallide cornea , fasciis 



