12 GENUS DOLIUM. 
Leneth 3 inches. Width 2 inches. 
Inhabits the Indian Ocean, towards the coasts of Ceylon, 
and the Antilles. 
This shell, like the following, appears removed from the pre- 
ceding species by the contraction of its aperture, and particu- 
larly by the transverse folds with which the columella is pro- 
vided; but these very differences appear to indicate the two as 
proper to form the transition from the Doxrum to the Cassis, 
which they approach, not having their abruptly raised canal, 
whilst they, at the same time, in all other respects, are allied to 
the Tuns. ; 
The animal, which has been examined by Quoy and Gaimard, 
presents the peculiarities of development which we have point- 
ed out in our type species; only the foot is neither dilated, nor 
auriculated before. The color of this mollusk is of a beautiful 
white, marked upon its circumference with triangular flames 
of a violet brown; the tentacule are long, slender and pointed, 
spotted with brown, in the form of triple rings; the trunk is 
white, the tube very long, pointed with brown and violet at its 
extremity. 
8. DOLIUM LATILABRE, Nosis. The Broad Lipped Tun. 
(Collect. Mass.) Woop. Ind. Test., suppl. pl. 4, fig. 1. 
Pl. IV, fig. 1. 
D. testi, ovato-globosA, crassiusculd, albida, longitudinaliter striata ; 
costis latis, complanatis, sulco impresso separatis; labro dextro arcuato, 
dilatato, reflexo, dentibus, sulciformibus remotis; columella duobus tuber- 
culis sulcatis, sulco impresso separatis, ornata. 
Shell ovate-globose, ventricose, pretty thick; spire point- 
ed, formed of six whirls, the upper of which are slightly con- 
vex, but little developed, having three or four transverse striz, 
very apparent, and spotted with brown blotches ; the lower 
whirl is very much inflated, completely surrounded by from 
fifteen to twenty equal ribs, depressed, but slightly rounded ; 
