6 GENUS DOLIUM. 
2. DOLIUM OLEARIUM, Lam. The Onion-Peel Tun. 
(Collect. Mass. Lam.) Roumpn., Mus., t. 27, fig. D. 
PIT, eet: 
D. testA ovato-globosa, ventricosa, tenui, fulvo-rufescente ; costis latis, 
complanatis, sulco impresso separatis; anfractibus prope suturas canalicu- 
latis. 
Shell pretty large, ovate-globose, ventricose, thin; spire 
conical, formed of six convex, very distinct whirls, loaded 
externally with wide, flat, slightly raised ribs, separated by 
narrow and superficial furrows. ‘The whirls of the spire are 
isolated by a deep channeled suture. The lower whirl round- 
ed and very ventricose. ‘The aperture is large, subovate, 
colored interiorly with reddish, and marked with transverse 
ribs corresponding to the furrows without. The right lip is 
dilated, undulated, tinged with black, or a deep brown upon 
the edge. The left lip is whitish, spread out in a very thin 
plate upon the belly of the lowest whirl. The columella is 
similar to that of the preceding species. ‘The external surface 
of this shell is of an uniform reddish fawn color; nevertheless 
the ribs are varied with wide spots or irregular brown and 
white blotches which are very remarkable. 
Length 5 inches. Width 4 inches. 
Inhabits the Indian Ocean, and the Antilles. 
This species, very common in collections, is almost diapha- 
nous when young; at that time the transverse ribs of the sur- 
face are only indicated by lines of a slightly deeper tint. The 
Latin name which has been given it, is derived from the use to 
which it is subservient in some countries: it serves as an oil- 
dipper. 
The animal is of a clear brownish red, without spots, and its 
tentacule are encircled, towards the point, with a wide reddish- 
brown ring. The foot beneath is of a dark violet, with the edge 
embroidered with deep brown. 
SO a 
