H6 MANUAL OF THE MOLLUSCA. 



oblique, nacreous ; lip thin, even-edged ; opere. circular, horuy, multi-spiral. 



On reefs and under stones at low-water. 



Distr., 20 sp. Cape, India, N. Australia, China, Japan, Philippines. 1 



Stih-genus ? Gena, Graj. Spire minute, marginal ; no operculum. IG.j 



sp. Red Sea, India, Seychelles, Swan River, Philippines (Adams). i 



Broderipia, Gray. I 



Etym., named in honour of W. J. Broderip, Esq., the distinguished cou- ) 

 chologist. 



Type, B. rosea. PI. X., fig. 20. 



Shell minute, limpet-shaped, with a posterior suh-inarginal apex ; aper- 

 ture oval, as large as the shell, brilliantly nacreous. 



Distr., B sp. Philippines ; Grimwood's Island, S. Seas (Cuming). 



FAMILY X. Haliotid-e. 



S//e/l spiral, ear-shaped or trochiform ; aperture large, nacreous ; outer 

 lip notched or perforated. No operculum. 



Animal with a short muzzle and subulate tentacles ; eyes on pedicels at 

 the outer bases of the tentacles ; branchial plumes 2 ; mantle-margin mth a 

 posterior (anal) fold or siphon, occupying the slit or perforation in the shell ; 

 operc. lobe rudimentary ; lingual dentition similar to trochus. 



In addition to the true haliotids, we have retained in this group such of 

 the trochi-form shells as have a notched or perforated aperture. 



Haliotis, L. Ear-shell. 



Etym., halios, marine, and ous (otos) an ear. • '' 



Type, H. tubercidata, PI. X., fig. 21. 



Shell ear-shaped, with a small fiat spire ; aperture veiy wide, iridescent ; 

 e.vterior striated, duU ; outer angle perforated by a series of holes, those of the 

 spire progressively closed. Muscular impresssiou horse-shoe shaped, the left 

 branch greatly dilated in front. In H. tricostalis (padoUus, Montf.) the 

 shell is fm-rowed parallel with the line of perforations. 



Animal with fimbriated head-lobes ; side-lobes fimbriated and cirrated ; 

 foot very large, rounded. Lingual teeth ; — median small ; laterals single, 

 befliu-like ; uncini about 70, with denticulated hooks, the first 4 very large. 



The haliotis abounds on the shores of the Channel Islands, where it is 

 r-.iUed the ormer, and is cooked after being well beaten to make it tender. 

 (Hanley) ; it is also eaten in Japan. It is said to adhere very firmly to the 

 rocks, with its large foot, like the limpet. The shell is much used for inlay, 

 iiig, and other ornamental purposes. 



Distr., 75 sp. Brit., Canaries, Cape, India, China, Australia, New Zealand, 

 Pacific, California. 



Fossil, 4 sp. Miocene — . Malta, &c. 



Sulj-genus ? DeridobrancJms, Ehrenberg, D. ai'gus. Red Sea. Shell 



