no CONCHOLOGY. 



ture entire, large, sublongitudinal ; right lip effuse, dilated, open. 

 Inhabits the Indian Ocean. Five species. 



Stomatella imbricata. Stomatella sulcifera. 



S. rubra. S. auricula. 



S. planulata. 



3. Genus Stomatia. PI. XL 

 .hiimal. Unknown. 



Shell. Earshaped, imperforate, spire prominent ; aperture en- 

 tire, large, oblong ; right margin aad columella equally raised ; a 

 transverse and tuberculated rib on the back. Inhabits the Indian 

 Ocean. Two species. 



Stomatia phymotis. Stomatia obscurata. 



4. Genus Haliotis. PI. XI. 



Animal. Body oval, much depressed, slightly spiral poste- 

 riorly, provided v^^ith a large f6ot doubly fringed at its circum- 

 ference ; head depressed ; tentacula a little flattened ; eyes at the 

 summit of prismatic peduncles situated at the external side of the 

 tentacula ; mantle very thin deeply slit at the left side ; the two 

 lobes pointed and forming by their union a kind of canal to con- 

 duct water into the branchial cavity, and including two very long 

 unequal branchial combs. 



Shell. This beautiful genus derives its name from its resem- 

 blance to the human ear. The exterior, tuberculated, and gene- 

 rally loaded with marine substances, <jiving it an uncouth appear- 

 ance, but its irridescent interior form& a magnificent contrast ; it 

 is pearly, with all the hues of the rainbow, recurving very de- 

 pressed, oval, spire very small, sometimes eroded, almost posterior, 

 aperture as large as the shell, with margins reflected inwards, 

 the right sharp, left flat, and enlarged ; disk pierced with holes, 

 disposed in a line parallel to and near the left margin, the last 

 commencing with a notch. These holes formed by the animal, 

 as it increases the size of the shell, to admit the passage of a short 

 syphon ; they adhere to rocks, and are removed with much difii- 

 culty. Inhabits the sea at Molucca. Nineteen species. 



