HALIOTIS. SEA-EAR. 43 



lateral ones, and in the beaks inclining a little to the longer 

 end : length a quarter of an inch ; breadth three eighths. 

 Devonshire, and North Britain : very rare. w. i 



6. Donax rubra. Red Wedge-shell. 



Montagu, Suppl. p. 38. 



Shell wedge-form, smooth, truncate at one end, of an 

 uniform reddish > color, inside the same, with the margin 

 smooth : beaks obtuse : hinge with two teeth in each valve, 

 placed angularly, and approaching each other at their sum- 

 mits : breadth not a line. 



Devonshire coasts, among Corallines : very rare. 



7 Donax Irus. Piercer Wedge-shell, 



Da Costa, pi. 15, f, 6, left hand ftg,-*~Donovan f pi. 29. 

 f f 2 Dorset Cat. pi. 12. f. 6, left hand fig. 



Shell somewhat oval, rugged, varying much in shape, 

 sometimes nearly as long as it is broad, sometimes twice 

 as broad as it is long, sometimes nearly flat, and often very 

 convex, brownish white, with numerous rather close-set 

 transverse-broken or undulated membranaceous ridges 

 which reflect upwards and are stronger towards one end, 

 the interstices finely striate longitudinally ; inside white or 

 flesh-color, with more or less of a purple tinge, the mar* 

 gin plain and smooth : beaks small, nearer one end, much 

 curved ; teeth small, often three together giving it the ap- 

 pearance of a Venus, two of them cloven ? length about a 

 quarter of an inch. 



Western coasts, and Howth in Ireland, imbedded in the 

 Hardest limestone, v. v. 



HALIOTIS. SEA-EAR. 



Shell with a single valve, ear-shaped, almost 

 entirely open, with a longitudinal row of orifices 

 towards the outer margin ; spire lateral, and flat 

 ppon the shell. 

 -1, Haliotis tuberculata. Tuberoled Sea^ear. Fig. 66. 



Lister, pi. 611. f. 2 Pennant, pi. 91 Da Costa, pi. 2, 

 f. 1, 2 Donovan, pi. 5Dorsst Cat. p\. 22. f. 1, 2. 



Shell thick,, strong, opa}ie ; rough^ flat> oval, stride Ion.* 



