262 



TLANORBINiE. 



Sub-gen. helisoma, Swainson. 



Shell ventricose, the spire sunk below the body whorl ; whorls 

 few, often angulated. 



affinis, C. B. Adams. 

 bicarinatus, Say. 

 Coromandelicus, Fabr, 

 corpulentus. Say. 

 defiectus, Say. 

 Fokkesii, Dkr. 

 fovealis, Mke. 

 glabratus, Say. 

 inflatus, Dkr. 

 interruptus, Shuttl. 



lentus, Say. 

 Maya, Morel. 

 Merguensis, Phil. 

 obesus, Dkr. 

 Peruvianus, Brod. 

 sericeus, Dkr. 

 tenagophilus, D'Orb, 

 tenuis, Phil. 

 trivolvis, Say. 



Sub-gen. tafhius, H. and A. Adams. 



Shell excavated beneath, whorls rounded; aperture oval, colu- 

 mellar margin rectilinear. 



Andecola, D'Orb. 



Sub-gen. menetus, H. and A. Adams (Anisus, Beck, not Fitz. 



?Hippeutis, Agassis). 



Shell depressed ; whorls rapidly increasing, periphery an- 

 gulated. 



angulatus, Phil. 

 commutatus, Dkr. 

 Cumingianus, Dkr. 

 decipieus, C. B. Adams. 

 ferrugineus, Moric. 

 Guadaloupensis, Sow. 

 heloicus, D'Orb. 

 helophilus, D'Orb. 

 lenticularis, Hartm. 



Moricandi, Beck. 

 multivolvis, Case. 

 olivaceus, Spix. 

 opercularis, Gould. 

 orbiculus, Morel. 

 pallidus, C. B. Adams. 

 Philippianus, Dkr. 

 refulgens, Dkr. 

 striatulus, Rich. 



