TLEURODONTE. 87 



Subgenus'PLEURODONTE Fischer. 



Shell generally solid, dark, depressed and opaque, the aperture 

 generally toothed. Genitalia characterized by the long epiphallus, 

 and lack of appendix on the penis. 



Section 1, Pleurodonte (sensu stricto}. Shell granulate, at least 

 above; imperforate ; aperture with compressed teeth on the basal lip 

 only, or if not toothed the shell is not acutely keeled. Jamaica. 



Section 2, Caprinus Montf. Shell solid, imperforate, with thick- 

 ened peristome, sometimes armed with nodular teeth. Lesser An- 

 tilles. 



Section 3, Gonostomopsis Pils. Shell thin, hirsute, umbilicate ; 

 aperture trilobate-lunar, outer and basal lips each with a tooth. 



Section 4, Caracolus Montf. Shell large, solid, carinated ; aper- 

 ture lacking teeth. Cuba, Haiti, Porto Rico. 



Section 5, Isomeria Alb. Shell depressed, large, dark, solid, not 

 acutely keeled ; aperture generally with small teeth. Ecuador, 

 Columbia. 



Section 6, Labyrinthus Beck. Shell carinated, depressed, with an 

 entering parietal lamella and two processes on the basal lip. 



Subgenus POLYDONTES Montf. 



Shell depressed or globose, often light colored or variegated with 

 many bands, the aperture generally toothless. Genitalia having 

 the epiphallus very short or obsolete, and often with a swollen ap- 

 pendix near the base of the penis. 



Section 7, Thelidomus Swains. Shell globose-depressed, baso-col- 

 umellar lip of the peristome wide and plate-like, sometimes toothed ; 

 aperture otherwise lacking teeth. 



Section 8, Polydontes Montf. Shell large, depressed, carinated >' 

 aperture toothless or with nodular teeth on the peristome; lip thick. 



Section 9, Partliena Alb. Shell capacious, unicolored or multi- 

 lineate. Aperture large, toothless; lip expanded. 



Section 10, LuquMia Crosse. Shell similar, but dark colored, 

 with conoidal spire. 



Section 11, Eimjcratera Beck. Shell large, globose, with few 

 whorls. Aperture very large, toothless. 



Section 1, Pleurodonte Fischer cle Waldheim. 



Pleurodonte F. de W., Tab. Synopt. Zoogn. p. 129 (Moscow, 

 1808) ; proposed for H. sinuata Gin., lychnuchus Gm., lucerna Gm., 



