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Columella callous, transverse, rather flat; margin acute, forming an angle at 

 the lower base of the right lip. Operculum corneous. 



H. neritella, 

 ' striata, 

 ' fasciata, 

 ' viridis, 

 ' pulchella, 



Pupa. Shell cy 

 the lower part roun 

 outwards, disunited 

 always affixed. 



II. substriata, 



' Brazil iensis, 

 ' costata, 

 ' aurantia, 

 ' rhodostoma, 



lindrical, generally 



ded and subangular 



at the upper part 



II. major, II. aureola, 

 ' submarginata, ' orbiculata, 



' unifesciata, ' scitula, 



' Brownii, ' Tankervillii. 



' depressa, 



thick; aperture irregular, demioval, 

 ; the margins nearly equal, reflected 

 by an interposed columella lamina, 



J*, numia, 



P. unicarinata, 



P. polyodon, 



P. umbilicata, 



' uva, 



' maculosa, 



' variabilis, 



' muscorum, 



' sulcata, 



' clavulata, 



' frumentum, 



' anglicus, 



' Candida, 



' ovularis, 



' secale, 



' rufescens, 



' lab rosso, 



1 Germanica, 



' avena, 



' edontulus, 



' fusus, 



' cinerea, 



' granum, 



' odontostotfia 



' tridentata, 



' tridens, 



' fragilis, 



' pctivoriana, 



' fasciolata, 



' quadridens, 



' dolium, 



' dentata. 



' zebra, 









Clausilia. Shell mostly fusiform, slender, the summit rather obtuse; 

 aperture irregular, rounded oval; the [margins united throughout, free, re- 

 flected outwards. 



C. torticollis, 

 ' truncatula, 

 ' retusa, 

 ' costulata, 



C. corrugata, 

 ' inflata, 

 ' teres, 

 ' denticulata, 



C. collaris, 

 ' papillaris, 

 ' plicatula, 

 ' rujrosa, 



C. gracilis, 

 ' chrysalis, 

 ' Mediterranea. 



Bulimus. Shell oval, oblong, or turreted; aperture entire, longitudinal; 

 the margins very unequal, disunited at the upper part. Columella straight, 

 smooth, the base entire, not channelled. 



B. ovatus, 

 hsemastomus, 

 gallina, 

 sultana, 

 zigzag, 

 undatus, 

 Ricliii, 

 inversus, 

 citrinus, 

 sultanus, 

 Pythogaster, 

 ovoideus, 

 interruptus, 



B. Peruvianus, 



4 Favanuii, 



' Kambeul, 



' calcareus, 



' decollatus, 



' Lyonetianus, 



' inflatus, 



' radiatus, 



' fragilis, 



' Gaudalupinsis, 



' Mexicanus, 



' multifasciatus, 



' Bengalensis, 



B. Caribaaorum, 

 ' octonus, 

 ' terebraster, 

 ' articulatus, 

 ' acutus, 

 ' ventricosus, 

 ' montanus, 

 ' hordaceus, 

 ' lubricus, 

 ' iostoma, 

 ' goniostoma, 

 ' odontostoma, 



B. formosus, 

 ' Listen, 

 ' Kingii, 

 ' Dufresnii, 

 ' pulcher, 

 ' Maugeri, 

 ' laavis, 

 ' auris leporis, 

 ' papyraceus, 

 ' scobinatus, 

 ' vexillum, 

 ' planidens. 



