HALIOTIS. 59 



the adult state; disc perforated with holes 



disposed in a line parallel to the left margin, 



which commences by a notch. 



H. IRIS. Roundish oblong, very large, thin, 

 with wrinkled plaits, variegated with red, bluish, 

 and green ; spire very slightly prominent, obtuse ; 

 left margin elevated ; very large. W. 36. 13. 



H. AUSTRALis. Oval-oblong, with oblique 

 plaits and wrinkles ; the spire prominent and gib- 

 bous, mottled with reddish and greyish ; from 

 seven to nine of the tubercles are perforated. 

 3...2i. W. 36. 11. 



H. TUBERCUL.ATA. Ovate-oblong, with the 

 outside longitudinally striated ; striae raised, and 

 where the distant transverse irregular folds cut 

 them tuberculated ; spire slightly prominent, 

 pearly within, mottled with green and red with- 

 out. B.3. W. 36. 4. 



H. STRIATA. Ovate-oblong, back flattish, con- 

 vex, longitudinally striated, transversely wrinkled, 

 rust-colour ; spire very slightly prominent ; inte- 

 rior very iridescent, and the outside strise visible 

 within. 2...!^. W. 36. 5. 



H. AsiNARiA. Elongate, narrowish; margin 

 somewhat sickle-shaped, smooth, with longitu- 

 dinal raised striae near the summit, marbled with 

 green, white, and brown ; spire very short. 2^ . . . 

 -lyVj pearly within. W. 36. 10. 



