GENUS D O L I U M . 



2. DOLIUM OLEARIUM, LAM. The Onion-Peel Tun. 



I 



(Collect. MASS. LAM.) HUMPH., Mus., t. 27, fig. D. 

 Pi. I, % l.6.*< 



D. testd ovato-globosA, ventricosA, tenui, fulvo-rufescente; costis latis, 

 complanatis, sulco impresso separatis ; anfractibus prope sutures 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 

 tentacular 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. 



