DESCRIPTION. 173 



black ; aperture white ; throat yellowish ; striae 

 numerous^ rounded. 



Inhabits 



The author is not aware of this species having 

 been described or named, although it be evidently 

 figured in Martyn's Universal Conchology : he has 

 therefore assumed its most remarkable character, 

 though far from a peculiar one, as its nominal di- 

 stinction. 



PLATE XXI. 



Fig. 1. Haliotis tuherculata. 



Shell sub-ovate ; back transversely striate, rug- 

 ged, and tuberculate. 



Lister Conch, tab. 611. fig. 2. 



Specimen whitish, mottled with olive green and 

 black ; inside perlaceous ; six orifices open. 



Inhabits the European, Atlantic, and Indian 

 oceans. 



The varieties of this species are very numerous, 

 and differ much at the different stages of their 

 growth. The specimen figured is less than usually 

 tuberculate or plaited, and is somewhat flatter at 

 the side ; but still there is little doubt of its be- 



