CYMBIUM. 
Pruate IX. 
Species 4. (Fig. 5 a, Mus. Brit.) 
In the specimen of Cymbium duecale here figured we have 
the original type of Mr. Broderip’s Melo wmbilicatus. As 
compared with the specimen figured at Plate VII. it is 
remarkable for its slenderly oblong form and lighter tex- 
ture, with the scales, in their correlation of growth, pro- 
, duced almost into horns, below which the spire is corre- 
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spondingly sunk. There are two such specimens in the 
British Museum, both covered with a beautiful epidermis, 
showing the faintest possible traces of the underlying net- 
| work. 
December, 1860, 
