FAMILY TURBINIDZ — MELANIA. 93 
M. dubtiosa. (Ip. 1. c. pl. 5, fig. 6.) Shell smooth, conical, rather thin. Whorls 7, somewhat convex: 
sutures linear; spire rather elevated ; aperture elliptical, subangular at the base, rather more 
than one-third of the total length. Allied to M. simplex of Say. Color, horn; aperture 
whitish. Length, 0°75; diameter, 0°3. Tennessee. 
M. ebenum. (Iv. 1. c. pl. 5, fig. 7.) Shell smooth, obtusely conical, thick: spire obtuse; sutures 
small; whorls somewhat convex ; aperture rather large, ovate, subangular at.base. Color, 
black or bluish ; aperture purplish. Length, 0°47; diameter, 0:3. Tennessee. 
M. rufescens. (Ip. 1. c. pl 5, fig. 8.) Shell smooth, turreted, rather thin, shining: spire elevated ; 
sutures impressed; whorls 8, convex, carinate towards the apex; aperture small, elliptical, 
subangular beneath. Color, dark red; within purplish. Length, 0°85 ; diameter 0°3. Ten- 
nessee. 
M. tuberculata. (M. stygia, Say, Am. Conch. Lea, 1. c. Vol. 4, pl. 15, fig. 31.) Shell robust, 
conic-ovate: spire rather larger than the aperture, eroded at the tip. Whorls 5, hardly 
convex ; wrinkles obsolete, except a few larger ones; aperture narrowed at base into a slight 
sinus, and subangulated, much widest in the middle ; lip much arched in the middle. Color, 
black. Resembles armifera, but that shell has tubercles and colored lines. Length, 0°75. 
Tennessee. 
M. armigera. (Say, Ac. Sc. Vol. 2, p. 178.) Shell tapering. Whorls about 6, slightly wrinkled : 
spire near the apex, eroded ; body-whorl with a revolving series of 5 — 6 distant prominent 
tubercles, which become obsolete on the spire, and are concealed by the revolutions of the 
succeeding whorls: hence an appearance of a small subsutural series of tubercles on the 
body-whorl. Columella with a distinct sinus at the base. Color, brownish horn, with two 
or three obsolete revolving reddish brown lines; apex whitish. Length, 1:0. Ohio river. 
M. hydet. (Conrav, Fr. Wat. Shells, pl. 8, fig. 1.) Shell conical, rather elevated. Whorls flat- 
tened, with spiral acute tuberculated lines: one or two on each whorl of the spire, and about 
four on the body-whorl ; the inferior one plain: aperture elliptical. Alabama. ; 
M. catenaria. (Say, Ac. Sc. Vol. 2, p. 379.) Shell conic. Whorls 7 - 8, slightly undulated 
transversely, and with 8 — 9 revolving elevated lines, the four or five superior ones of which 
are almost interrupted between the undulations. Color, blackish. Length, 0°45. South- 
Carolina. 
M. cancellata. (Say, Des. terr. etc. p. 16.) Shell rather slender, attenuated. Whorls convex, 
with about twenty-six reclivate longitudinal elevated lines crossed by about eighteen revolv- 
ing ones, the eight or nine towards the base crowded. Length, 0°8. Allied to catenaria, 
but more elongated and attenuated. Florida. 
M. fusiformis. (Lea, Tr. Am. Phil. Soc. Vol. 8, p. 167, pl. 5, fig. 9.) Shell smooth, fusiform, 
rather thin, pointed at the apex: spire short; sutures linear; whorls 6, the last large and 
inflated ; aperture ovately elongated. Color, yellow; aperture whitish. Length, 0°5; dia- 
meter, 0°27. Tennessee. 
M. claveformis. (Ip. 1. c. pl. 5, fig. 10.) Shell smooth, shining, club-shaped, rather thin: spire 
acute; sutures somewhat impressed; whorls eight, convex; aperture elongated. Color, 
chesnut brown ; aperture light purple. Length, 0°67; diameter, 0°27. Tennessee. 
