LUCERNA. 201 



denticns, Virus. nucleola, Hang, 



formosa, Ferns. obesa, Beck. 



Glasiana, Shuttl. pachygastra, Gray. 



Isabella, Ferus. parilis, Ferns. 



Josephina, Ferus. pseudoparilis, Grat. 



monodonta, Lea. punctata, Born. 

 nigrescens, Wood. 



Sub-gen. serpentulus, Klein (Lampadion, Bolten. Caracolus, 

 Montf. Caracolla, Sell nut. Discodoma, Strains.). 



Shell solid, orbiculately depressed, carinate, flattened at the 

 base, widely umbilicated, or with the umbilicus somewhat co- 

 vered, last whorl a little deflexed ; aperture sub-angulated ; peri- 

 stome thick, the columella reflexed at the umbilicus. 



angistoma, Ferus. Mina, Pfeiff. 



Bornii, Chem. pyrostoma, Ferus. 



caracolla, Linn. Richmondiana, Pfeiff. 



excellens, Pfeiff. rostrata, Pfeiff. 



gulosa, Gould. sagemon, Beck. 



lampas, Mull. sarchocheila, Mdrch. 

 Linnoeana, Pfeiff. 



Sub-gen. obba, Beck (Planispira, Beck. Pusiodon, Swains. 

 Philina, Albers. Gallina, Hartm.). 



Shell lenticular, or orbiculately depressed, usually umbilicated ; 

 peristome reflexed, the margins often confluent as far as the 

 umbilicus, the basal often furnished in the middle with a denti- 

 form tubercle. 



bituberculata, Pfeiff. exceptiuncula, Ferus. 



bizonia, Ferus. gallinula, Pfeiff. 



brevidens, Sow. Grayana, Pfeiff. 



coluber, Beck. Hartwegi, Pfeiff. 



columbaria, Sow. Lasallii, Eyd. 



Duclosiana, Ferns. Listeri, Gray 



