160 EUROPEAN SPECIES OF VERTIGO. 



V. genesii, 78 ; dica:a, 63 ; cela-ta, 64 ; inermis, 62 ; eggeri, 



66; regularis, 65. 



Aperture toothed. 3. 



3. No crest behind the peristome. 4. 

 Having a crest. 6. 



4. No palatal callus, the palatal folds standing free. 5. 

 Palatal folds united in front by a palatal callus. 



V. eremia, 61. 



5. One parietal lamella or none : V. daliaca, 69 ; pineticola, 

 70 ; krauseana, 26 ; hebraica ; gemma, 71 ; ovoidea, 72 ; 

 arctica, 67 ; tatrica, 676 ; alpestris, 74 ; acheila, 76 ; /leZdi, 

 74a; haeusleri, 52a ; schultzii, 75; helvetica, 74d; leontina, 

 74&; biittneri, 77. 



Having two lamellae on the parietal wall: thibetica, 

 vol. xxiv, p. 138. 



6. No palatal callus between the palatal folds. 7. 

 Palatal folds united by a palatal callus. 8. 



7. No impression behind the outer lip, crest weak : V. decora, 

 25 ; ro-nnebynesis, 68 ; graellsiana, 56. 



An impression between the strong crest and the edge of 

 outer lip: V. antivertigo, 45; lilljeborgi, 46; kiisteriana, 

 53& ; latasteana, 45. 



8. One parietal lamella: V. moulinsiana, 53; pachyga-ster, 

 54; pygmcca, 52; loroisiana, 55; aprica, 57; coe&a, 58; 

 briobia, 59 ; microlena, 60. 



Two lamellae on parietal wall : y. sieversi, 73 ; substriata, 

 51 ; remana, 45c ; baudoni, 47 ; dischettia, 49 ; maresi, 50. 



9. Upper palatal fold not longer than the lower when 

 present. 10. 

 Upper palatal fold very long, entering to the dorsal side ; 

 columellar lamella spirally ascending, blunt : y. angustior, 

 81 ; callista, 82. 



10. 5 to 10 teeth: V. p-usitta, 42; erla-ndi, 44; collina, 43. 

 2 or 3 teeth : y. otostoma, 79 ; clevei, 80. 



Group of V. pusMa. 



These are merely sinistral species, otherwise like the a/nti- 

 vertigo group. 



