TBUNCATELLJNA. 



73 



Pupa strobeli Gredler is clearly the same species, and it has 

 almost universally been known by this name. Gredler 's de- 

 scription follows. Shell very small, cylindric, of almost equal 

 breadth, obtuse above; very finely and regularly rib-striate, 

 with silky luster, rather translucent light horn-color or red- 

 dish yellow. Whorls 5 or 6, convex, low, parted by a deeply 

 constricting suture, the last whorl often scarcely noticeably 

 compressed around the funnel-shaped umbilicus and on the 

 neck towards the rounded base. Aperture rounded ovate, 

 generally 3-toothed: 1 somewhat curved and fold-like tooth 

 on the parietal wall, running inward, a smaller tooth on the 

 columella, and a drop-shaped tooth (in old examples often 

 prolonged inward) in the palate, and externally visible on the 

 neck. Peristome outwardly arched, but little thickened, the 

 terminations joined by a glossy callus (Gredler}. Type loc., 

 Klausen, southern Tyrol, on the garden hill of the Capuchin 

 Fathers, under moss on sandy soil (Gredler) ; also generally 

 distributed in that country. 



Ill-defined forms related to rivierana. 



Various ill-defined names in the literature may have been 

 based upon T. rivierana, T. claustralis or nearly related 

 forms. Some French and Italian records of muscorum Drap. 

 and minutissima Hartm. also included rivierana, judging 

 from the remarks as to presence of teeth. Most of these names 

 (including T. callicratis Scacchi) are anterior to the names 

 rivierana, strobeli and claustralis. By thorough collecting in 

 the type localities, no doubt most of them could be recog- 

 nized with a certain degree of probability; yet the descrip- 

 tions are so inadequate that in my opinion later recognizably 

 defined names should not be displaced. 



Pupa minuta Studer was denned thus: [Pupa] minuta 

 Drap., iii, f. 26, 27. P. muscorum der Franzosen. Von Venetz 

 in Wallis und von Charpentier bey Bex gefunden (Studer, 

 Naturwiss. Anzeiger der allg. Schweizerischen Ges. fur die 

 gesammten Naturwissenschaften, No. 11, May 1, 1820, p. 89). 

 It was placed by Studer in the division of Pupa with "ge- 

 zahnte Miindung", and was probably a form of rivierana. 



Pupa minutissima. Ganz Fassformig, langlich, die Um- 

 gange sehr anpassend ; die ganze Lange betragt nur %"' auch 

 ist die Schaale diinne. Die Miindung enhalt einen Zahn. Sie 



