— 106 - 



perist. Simplex acutum , margine columellari eubstricto, declivi, calloso- 

 incrassalo. Diam. maj. 22, min. 20, alt. 18 mili. 



Helix Foremaniaiia Adams Contr. to Conch. Nr. 5. p. 80. 



Q„Hellx Forcmaniana. Shell ovoid, with a scarcely perceptible 

 obtuse angle on the periphery : white, with a very pale horn- 

 coloured epidermis : with fine irregulär Striae of growth, and 

 sometimes on the lovver side of the last whorl with inequi- 

 distant unequal concentric Striae: spire very much elevated, 

 with very convex outlines: whorls seven and one half, quüe 

 convex , with a well impressed suture ; last whorl very 

 convex beneath lo Ihe cenlre , wilhonl any indenlalion in 

 the umbilical region: aperture obllquely lunate , wider below 

 than abovej wUhbiy a little below the middle of the right 

 side, is a long lamellar Inotli , commencing abruptly in the 

 bottom of the aperture , and gradually diminishing in height 

 to its terminaiion a lillle witliin the margin ; wilh a wide 

 irregulär lootli on the end of Ihe columella : labrum sharp: 

 umbilicus wanting etc. 



Oreatest breadth .78 inch. ; least breadth .73inch.; height 

 .9 inch.") 



Obs. Vergleichen wir die Pfeifferische Diagnose mit 

 der Adams'schen Beschreibung, so sehen wir hier wieder, 

 dass er eine ganz andere Schnecke beschrieben hat. 

 Pfeiffer sagt: anfr. convexiusculi, Adams: e toto convexi; 

 Pfeiffer: anfr. ultimus basi profunde impressus, Adams: 

 anfr. ultimus subtus convexissimus usque ad centrum, 

 sine uUa indentalione in regione umbilicali; Pfeiffer: in- 

 tus lamelia valida subspirali , pluries interrupta munita, 

 Adams: intus dens lamellaris longa, ex fundo aper- 

 turse subito oriens, altitudine versus ejusdem termi- 

 nalionem pone margiiiem gradatim decresceus ; Pfeiffer: 

 margine columellari calloso-incrassato, Adams: dens lata 

 irregularis ad basin columellee. 



Die Bildung der basal zahnartigen Lamelle beweist, 

 dass Pfeiffer die gleiche Art beschrieben hat, die früher 

 Dillwyn und Adams unter H. epistylium verstanden, und 

 Beck als die Chemnilzische Trochus auslralis erkannte. 



