OTOSTOMUS. 151 



Deshayesii, Pfeiff. pratextus, Reeve. 



hygrohylaeus, D'Orb. subinterruptus, Pfeiff. 



marmarinus, D'Orb. xanthostoma, D'Orb. 



Sub-geu. i/EiosTiucus, Albers. 



Shell thin, perforate, oblong-conical, glabrous, very often 

 shining, pellucid, last whorl shorter than the spire ; peristome 

 thin, more or less expanded, the colutncllar margin dilated, 

 reflex ed. 



angulosus, Beck. multifasciatus, Lam. 



auratus, Pfeiff. onager, Beck. 



castus, Pfeiff. Pateli, Albers. 



ciunamomeo-lineatus, Moric. tribalteatus, Ecrrc. 



Gruneri, Pfeiff. vimineus, Moric. 



Jonasi, Pfeiff, Vincentinus, Pfeiff. 



Manoeli, Moric. vittatus, Spix. 



Mexicanus, Lam. Ziegleri, Pfeiff. 



Sub-gen. gontostomus, Beck. 



Shell rimately-perforate, fusiform, or oblong-conical ; spire 

 elongate, last whorl attenuated at the base; aperture oblong, 

 more or less channelled anteriorly ; columella arcuate, sub-plicate ; 

 peristome expanded, shortly reflexed. 



angulatus, Wagn. fusiformis, Rang. 



Capueira, Spix. goniostoma, Fcras. 



egregius, Pfeiff. Lattrei, Pfeiff. 



Sub-gen. aspastus, Albers. 



Shell perforate, fusiform, thin, sub-diaphanous, sulcato-striate, 

 last whorl larger than the spire ; aperture ovate-oblong, rounded 

 anteriorly; columella sub-arcuate ; peristome marginate, shortly 

 reflexed, the margins approximate, united by a thin callus. 



Cleryi, Petit. miltochcilus, lb err. 



