HALIOTIS. 59 
the adult state; disc perforated with holes 
disposed in a line parallel to the left margin, 
which commences by a notch. 
H.1r1s. 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. austraAuis. 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. 
meee. WW. 30. TE. 
H. ruspercuLata. Ovate-oblong, with the 
outside longitudinally striated; striz 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 strie visible 
within.. 2...14.  W. 36. 5. 
H. aAstnaAriA. Elongate, narrowish; margin 
somewhat sickle-shaped, smooth, with longitu- 
dinal raised striz near the summit, marbled with 
green, white, and brown ; spire very short. 2}... 
lyz; pearly within. W. 36. 10. 
