ACHATINIDA, 61 
RUMINA, Risso, 1826. (Orbitina, Risso, 1826. Cylindrina, 
Schlutt., 1838.) Shell turriculated, the adult always truncate ; 
whorls numerous, plane, with moderately impressed suture ; 
aperture small, oval, the peristome slightly thickened, its 
extremities united by a slight callus. 
S. decollata, Linn. (xcix, 82, 83), is a native of the Mediter- 
ranean region of Europe; it is acclimated at Charleston, S.C. 
CLAVATOR, Martens, 1860. Shell turreted-conical, not shining ; 
flavously striate; peristome simple, obtuse. S. clavator, Petit. 
2sp. Madagascar. 
opEAS, Albers, 1850. Shell thin, umbilicated or imperforate, 
usually small, subulate, covered with strize or small ribs; aper- 
ture oval-oblong; peristome simple, columellar lip reflected. S. 
octonoides, Ads. (xcix, 84). 63 sp. West Indies, Java, ete. 
sprrAxis, C. B. Ad., 1850. Shell elongated, acuminate, very 
finely longitudinally striate; columella tortuous; peristome 
simple. 44 sp. India, China, West Indies, Mexico, Central 
America. 
Huspiraxis, Pfr., 1855. Turreted, thin, striulate or costulate, 
shining ; whorls 6-9, rather flat ; aperture ovate-oblong, one-third 
to one-half the total leneth; peristome simple, acute. 8S. 
aberrans, Pfr. (xcix, 85). 
Nothus, Albers, 1850. Shell imperforate, oblong-conic, thin, 
diaphanous; whorls six or more, the last about the length of 
the spire; columella short, doubly tortuous; columellar lip 
reflected; aperture small, semioval; peristome simple. S. 
Salleana, Pfr. 
Lamellaxis, Strebel and Pfeffer, 1882. S. Mexicanus, Pfeitfer. 
SUBULINA, Beck, 1837. (Macrospira, Swains., 1840.) Shell 
diaphanous, cylindrical, turriculated or conic-elongated, with 
obtuse summit; whorls numerous, slowly increasing in size; aper- 
ture oval, short, columella subarcuated and obliquely truncated at 
base; peristome sharp. S. sulcatus, Gray (xcix, 86, reversed in 
error). 90 sp. India, E. and W. Africa, West Indies, Mexico, 
Central America. 
Glandinella, Pfeiffer, 1878. S. Poeyanus, Pfr. Isle of Pines, 
near Cuba. 
GLESSULA, Albers, 1860. (Electra, Albers, 1850.) Shell ovate- 
oblong, thin, diaphanous; spire pyramidal, apex obtuse; whorls 
numerous, the last inflated ; columella short, arcuated, abruptly 
truncated. G. Ceylonica, Pfr. (xcix, 89). 59 sp. India, Hast 
Indies, W. Africa. 
MELANIELLA, Pfeiffer, 1859. Shell imperforate, costate, decus- 
sated; brownish horn-color; whorls nine, slightly convex, 
eradate; aperture effuse at base, ovate; columella strict; 
peristome simple, subcontinuous. S. acuticostata, d’Orb. (xcix, 
87). 8sp. Cuba, Trinidad, Florida. 
