128 C.-A. Wesierlund, 



PLANOREIS *GOËSI mh. 



Testa depressissima, supra et infra medio sequaliter excavata, rufe- 

 scens; anfr. 6, lente accrescentes, prirai utrinque fequaliter convexi, ultimus 

 penultimo multo latior, supra convexus, subtus planulatus, striolis vix con- 

 spicuis, basi subcarinatus, ad aperturam deflexus; sutura utrinque profunda; 

 apertnra obliqua, deflexa, subcordato-ovalis ; peristoma simplex, acutum, mar- 

 gine dextro arcuate producto. Diam. 6 — 8 ram. 



Hah. In Suecia ad Mjölsefall prov. Östergötland, baud rarus. — 

 Nomen subspecificum in meraoriam inventoria , beat, doctoris E. v. Goes , 

 qui faunam malacologicam patriae sub vita longa et etiamnum in setate pro- 

 vecta prsecipue amavit et deligenter qusesixit. 



5. PLÂNOEBIS DISCUS Paer., Rossm. 



Testa discoidea, supra convexiuscula, subtus concava, lutescenti-albida 

 (stepe limo obducta), glabra, nitidula, tenera; anfr. 5, lente accrescentes, 

 ultiraus supra convexus, subtus planiusculus, basi augulatus, impressione 

 margini paralleli destituta; sntnra utrinque profunda; apertnra oblique sub- 

 cordata; peristoma rectum, simplex, tenerum, lamella tenuissima continuum. 

 Diam. 5 — 6 , alt. 1 mm. 



Planorbis discus EossraSssler Iconogr. XVIII (1859) p. 134. f. 965. Westeilund Ma- 

 lak. Bl. 1867, p. 201. 



Hah. In Suecia banc testam in lacu Tåkern prov. Östergötland 

 1867 inveni et ab Ultuna prope Upsala prov. Upland specimina numerosa, 

 a. 1851 lecta, amie. J. E. Zetterstedt communicavit. (Celeberr. Parreyss, 

 oui exempl. a. 1869 misi, speciem approbavit). 



6. PLANORBIS SPIRORBIS (Lin.) Müll. 



Testa depressa, utrinque medio plus minus concava, corneo-fusca vel 

 flavescens, interdum albida, arcuatira striatula, nitidula; anfr, 5 — 5^, sen- 

 sim accrescentes, teretes, ultimus major, cylindraceus , inferne obsolete ca- 

 rinato-angulatus, subtus planulatus, ad aperturam fascia e labro flava; aper- 

 tnra parva, obliqua, rotundata, subangulata; peristoma albo-labiatum, mar- 

 ginibus lamina tenuissima albida saipius conjunctis. Diam. 5 — 6 mm. 



I-MLv spirorbis Linné Syst. Nat. X (1758) p. 770; Fauna Sn. ed. 2 (1761) p. 528. 



Planorbis spirorbis Müller Verra. Hist. II (1774) p. 161. Nilssoa Hist. Moll. Su. 



(1872) p. 78. Friele pr. p. Norske Moll. (1853) p. 34. Nord, et Nyl. pr. p. 



