GALERUS. 3G7 



mentary columella. The species are principally natives 

 of the shores of South America. 



Species of Trochita. 



Lamarckii, Desh. radians, Lam. 



occideutalis, Gray. spirata, Forbes. 



Sub-gen. haltottdea, Swainson (not Humphrey). 



Shell umbilicated ; spire excentric, usually of two whorls, and 

 placed latero-posteriorly, whorls rounded, simple, not radiately 

 plicate. 



comma-notata, Sorv. dilatata, Soiv. 



Genus GALERUS, Humphrey. 



Muzzle bilabiate, buccal appendages short, rounded ; a 

 slightly-developed plain-edged neck-lobe ; foot auriculate 

 in front. 



Shell depressly conical ; apex vertical, produced, sub- 

 spiral, nearly central, whorls flattened, smooth, ribbed or 

 spinose; aperture deep, with the internal appendage entire, 

 subspiral, lateral, and adherent ; the columellar edge folded 

 back on itself, forming a false umbilicus ; the front edge 

 produced. 



Si/n. ? Ancile, Meusch. Mitella, D'Ai'genville, Leacli^ 

 not Oken. Mitrula, Gray. Trochilla, Swains. Infundi- 

 bulum, J. Soiv.y not D^Orb. or Montf. Sigapatella, Less. 

 Siphopatella, Less. 



Ex. G. Chinensis, Linnaus, pi. 40, fig. 6. Shell, 

 G. Chinensis, fig. 6, a. 



