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Achatina. Shell oval or oblong; aperture entire, longitudinal; the right 

 lip sharp, never reflected. Columella smooth, truncated at the base. 



A. columnaria, 

 ' folliculus, 

 ' acicula, 

 ' oleacea, (n. s.) 

 1 Marminii, (n. s.) 



A. perdix, 

 ' zebra, 

 ' immaculata, 

 ' purpurea, 

 ' acuta, 

 ' bicarinata, 



A. Mauritiana, 

 ' castanea, 

 ' ustulata, 

 ' vexillum, 

 ' virginea, 

 ' Priamus, 



A. plans, 

 ' Peruviana, 



' albo-lineata, 

 ' fusco-lineata, 

 ' fulminea, 



Succinea. Shell oval or ovate conical; aperture large, entire, longitu- 

 dinal; the right lip sharp, not reflected, united at the lower part to a smooth, 

 sharp, attenuated columella. No operculum. 



S. cuculata, S. oblonga, S. patula, S. rubescens, (n. s.) 



' amphibia, 



Auricula. Shell suboval or ovate oblong; aperture longitudinal, very- 

 entire at the base, contracted at the upper part, where the margins are dis- 

 united. Columella with one or more plaits; the lip or margin sometimes re- 

 flected outwards, sometimes simple and sharp. 



A. Midte, 



A. felis, A. myosotis, 



A. nitens, 



' Judse, 



' scarabaeus, ' minima, 



' monile, 



' sileni, 



: bovina, ' Dombeiana, 



' angiostoma, 



' leporis, 



c caprella, ' coniformis, 



' labrella. 



Cyclostoma. 



The shape of the shell variable; whorls of the spire cylin- 



drical; aperture round, regular; the margins circularly 



united, or reflected by 



age. An operculum. 





C. planorbula, 



C. rugosa, C. mumia, 



C. ligata, 



' volvulus, 



' labeo, ' quarternata, 



' lincinella, 



' carinata, 



' interrupta, ' ferruginea, 



' orbella, 



' sulcata, 



' ambigua, ' decussata, 



' fimbriata, 



' unicarinata, 



' semilabris, ' lineolata, 



' multilabris, 



' tricarinata, 



' flavula, ' mammillaris, 



' elegans. 



' obsoleta, 



' fasciata, 



Doubtful species. 





C. patulum, 



C. lseve, . C. elongatum, 



C. aurantium, 



' truncatum, 



' Chemnitzii, ' maculatum, 



' flavidum, 



' petiverianum, 



' fascia, ' columna, 



1 tortum, 



' Jamaicense, 



' fulvum, ' mirabile, 



' compressum. 



' pulchrum, 







