>4o] Helicinenstudien. -43 



Formenkreis Rostrata n. 



Helicina (Retorquata) rostrata Mordet. 

 » » denticulata Pfeiffer. 



Formenkreis Succiucta n. 



Helicina (Retorquata) succincta Martens. 

 » » strebeli Pfeiffer. 



» » microdina Mordet. 



» » » incommoda n. 



Formenkreis Orbiculata n. 



Helicina (Retorquata) orbiculata Say. 



» borealis Martens. 



Formenkreis Subelobulosa n. 



"6* 



Helicina (Retorquata) subglobulosa Poey. 

 » poeyi Pfeiffer. 



Helicina (Retorquata) malleata Pfeiffer. 



antillarum Sowerby. 

 » globulosa d'Orbigny. 



INDEX. 



Seite 



Angulata n. Formenkreis 26 [228] 



Ceratopoma Möllendorff Subgenus 5 [207] 



Concentrica n. Formep.kreis 18 [220] 



Euneritella n. > 10 [212] 



Helicina Lamarck Genus 10 [212] 



Helicina adspersa Pfeiffer 15 [217] 



> ambeliaiia Sowerby 29 [231] 



» amoena Pfeiffer 17 [219] 



angulata Sowerby 26 [228] 



» antillarum Sowerby 39 [24 1] 



besehet Pfeiffer 25 [227] 



borealis Martens . . . 37 [239] 



botteriana Pfeiffer 23 [225] 



» brasiliensis Gray 27 [229] 



> caracolla Moricand 25 [227] 



6* 



