ATYS.—P.atTeE V. 
Species 50. (Mus. Brit.) 
ATYS PORCELLANA. At. test@ albd tenui, cylindrica, 
utrinque truncatd, spiraliter minutissimé striata ; 
apicé subumbilicato, lateribus rectiusculis ; columella 
erassd, brevi, tortud, labio externo supra medium 
inflexo. 
THE porcELAIN Atys. Shell white, thin, cylindrical ; 
truncated at both ends, spirally very minutely | 
striated ; apex subumbilicated ; sides rather 
straight; columella thick, short, tortuous; outer 
lip inflected above the centre. 
GUILDING. 
Hab, (Kagosina; Western States. 
The form in this species borders on that of Cy- 
lichna. 


