GENUS DOLIUM. 9 
5. DOLIUM VARIEGATUM, Lam. The Variegated Tun. 
(Collect. Mass. Lam.) 
Pl. Il, fig. 3 et 3 a, young. 
D. testA ovato-globosi, ventricosd, umbilicata, tenui, albo et rufo varie- 
gata ; costis convexis, confertis, aliis albis rufo-maculatis, aliis rufis; spird 
brevi. 
Shell ovate-globose, ventricose, thin; spire composed of 
six convex whirls, slightly separated by a shallow suture, and 
loaded with transverse rounded ribs, which are very approxi- 
mate. ‘The lower whirl composes, itself, almost the whole of 
the shell; twenty to twenty-six transverse ribs may be count- 
ed upon its surface, among which, in old specimens, are found 
other smaller ones which are alternately disposed between 
the first, towards the most elevated part. All the ribs are 
separated by furrows which are not throughout of the same 
size. ‘The aperture is wide, large and ovate; its lips are 
white, and the interior reddish. The right lip, terminated by 
a scolloped dilatation, is traversed by a canal of no great 
depth. The left lip is white, thin, applied to the body of 
the lower whirl, and forms a part of the umbilicus. The 
columella is twisted spirally. The coloring of the exterior 
is whitish, varied with red, and covered, upon the transverse 
ribs, with irregular spots which sometimes form longitudinal 
or zigzag bands of a deeper color. The epidermis is thin 
and reddish. 
Length 4 inches. Width 3 inches. 
Inhabits the Indian Seas, the Isle of France, the shores of 
Ceylon, and of New Holland. 
This species is somewhat allied to the Dotium maculatum, 
but its small chords or ribs, very approximate to each other, dis- 
tinguish it materially from this last shell. Upon some specimens 
are observed ribs which have no other tint of coloring than the 
ground of the shell. Young specimens are diaphanous and 
slightly colored by spots. 
