UNIVALVES. — HALIOTIS. 13? 



has an ovate form, with an exserted spire and prickly ribs, 

 is a rare shell. 



The Haliotis tuberculata is found on the British coasts. 

 The H. parva is remarkable for its red or scarlet colour, 

 and for having but one large elevated rib or angle on its 

 back. The H. bistriata is peculiar for having a succession 

 of double elevated striae, placed in a transverse direction 

 on the back. The H. pulcherrima is a beautiful and rare 

 shell from the South Seas. 



The H. iris, (from New Zealand), is celebrated for its 

 bright iridescent colours, which are finely contrasted with 

 a green and gold bronze-like lustre. The H. gigantea, 

 from New Holland, sometimes exceeds a foot in length. 



The Haliotides are found on the shores of Europe, Afri- 

 ca, and India; where, like the limpets, they adhere to the 

 rocks, from which they are with difficulty removed. 



HALIOTIS— S-ea-Ear. 



Division I. — Shell perforated. 

 Family 1. — Roundish or ovate. 



Midae — Midas' -Ear. Australis — Rough-plaited. 



Pulcherrima — Beautiful. Gigantea — Gigantic. 



Virginea — Iridescent. Iris — Iris. 



* Tuberculata — Common. Cracherodii — Cracherode's. 



Striata — Wrinkled. Ovina — Chesnut-marble. 



Bistriata — Double- lined. Parva — Small-orange. 



Varia — Rough- striated. Rufescens — Magnificent. 



Marmorata — Marbled. Splendens — Splendid. 



Glabra — Smooth-mottled. Corrugata — Corrugated. 



Family 2. — Oblong. 

 Asinina — Ass's-ear. 



Division II. — Shell imperforate. 



Imperforata — Carinated. Impertusa — Imperforate. 



Duhla.— Doubtful. 



