FAMILY TURBINIDZ — ANCULOTUS. 103 
A. plicatus. (Ip. Ib. pl. 8, fig. 18.) Suboval with a short spire, of which one whorl only is entire, 
rounded: body-whor!l slightly ventricose, with oblique plaits, which are crenulated on the margins 
of a slight spiral groove near the suture; aperture elliptical. Color, greenish or blackish, with 
spiral bands. Alabama. 
A, pictus. (Ip. Ib. pl. 62. Am. Jour. Vol. 25, p. 342, pl. 1, fig. 15.) Suboval; shoulder obtusely 
rounded; aperture obovate, large; columella callous above. Color, olive, with numerous quadran- 
gular small spots disposed in revolving lines, strongly marking the aperture. Length, 0°5; dia- 
meter, 0°35. Alabama River. 
A. proerosus. (Say, Ac. Sc. Vol. 2, p. 177. Conran, 1. c. pl. 8, fig. 18.) Subglobose, oval: whorls 
3-4, wrinkled across; spire very short, much eroded, sometimes scarcely prominent above the 
body-whorl, which is large, ventricose, with a very obtuse revolving band; aperture suboval, above 
acute, effuse; base of the columella elongated and incurved, meeting the exterior lip at an angle. 
Color, brownish; a few revolving purplish dots within, sometimes obsolete. Length, 0-+8. Ohio. 
A. pumilus. (Conran, Op. cit. p. 62.) Very small, obliquely oval: spire consisting of one entire 
convex whorl; apex eroded; body-whorl regularly convex; base with a groove behind the colu- 
mella; aperture patulous, suborbicular. Color, blackish. Alabama. 
A. subglobosus. (Say, Ac. Sc. Vol. 5, 128. Conran, pl. 8, fig. 14.) Subglobose: spire but little 
elevated, not half the length of the aperture; whorls about four; aperture rounded, nearly as 
broad as long; pillar-lip somewhat flattened. Color, brownish horn; aperture more or less tinged 
with red. Length, 0°6; diameter, 0°5. Virginia. 
A. taniatus. (Ip. loc. cit. p. 63.) Shell oval or oblong: one whorl of the spire not eroded, often 
longitudinally produced. Color, olivaceous, with dark green spiral bands: four on the body- 
whorl, Length,0°7. Alabama. 
Genus Io, Lea. Shell fusiform; base canaliculate; spire elevated ; columella smooth and concave. 
Io fusiformis. (LEa, Trans. Am. Phil. Soc. Vol. 4, p. 122, pl. 15, fig. 37. a. B. Fusus fluviatilis, 
Say, Jour. Acad. Nat. Sciences, Vol. 5, p. 129.) Shell fusiform: spire much elevated, gradually 
tapering ; volutions nearly six, wrinkled across, and with a series of elevated undulations on the 
middle; suture merely an impressed line ; aperture somewhat fusiform; lip within the edge, undu- 
lated; canal rounded at tip; columella very concave. Color, olive green or brownish, with more 
or less dull reddish lines of the same, confluent. Length, 1*8; diameter, 0°9. Salt streams in 
the interior of Virginia. 
