267 PROCEEDINGS OF THE MALACOLOGICAL SOCIETY. 
Diloma corrosa (Adams): Hutton, Trans. New Zealand Inst., vol. xv, 
p- 126, pl. xv, fig. D (radula). 
Labio Hectori, Hutton: Cat. Mar. Moll. New Zealand, 1873, p. 37. 
Lrochocochlea chloropoda, Tate: Zool. and Pal. Misc., p. 10 (teste 
Hutton). 
Monodonta melaloma (Menke): Hutton, Proc. Linn. Soc. New South 
Wales, vol. ix, p. 366. 
Monodonta melanoloma, Menke: Pilsbry, Man. Conch., ser. 1, vol. xy 
p. 104, pl. xxii, figs. 56, 57. 
Shell globose, conical, roughened and eroded, purplish, body-whorl 
mostly yellowish; more or less distinctly lirate. Outer lip yellow- 
edged, followed by a black band. Columella arcuate, with a small 
tooth below the middle. Umbilical tract narrow, concave, bounded by 
dark-grey. Alt. 15, diam. 16mm. 
Hab.—On mud-flats of estuaries in brackish water, Heathcote 
Estuary, near Christchurch (H, 8.). 
Var. undulosa, A. Adams. 
Chlorostoma undulosum, A. Adams: Proc. Zool. Soc., 1851, p. 182. 
For synonymy, see Pilsbry, Man. Conch, ser. 1, vol. Xl, 
p. 105, pl. xxi, figs. 45-7. 
Larger than the type, and the spiral striation more distinct; 
yellowish, with undulating lines of dark-purple. Alt. 18, diam. 
20 mm. ; alt. 17, diam. 22 mm. 
fab.—Sumuer to Dunedin. On rocks: not common. 
Var. plumbea, Hutton. 
Diloma plumbea, Hutton: Trans. New Zealand Inst., vol. xv (1883), 
p. 126, pl. xv, fig. E (radula). 
Monodonta melaloma var. plumbea: Proc. Linn. Soc. New South Wales, 
vol. ix, p. 867; Pilsbry, Man. Conch., ser. 1, vol. xi, p. 105, 
pl. xxii, figs. 45-7, 
Shell dull-purplish, spire mostly eroded, roughened, last whorl 
obsoletely lirate. Outer hip edged with black. Columella and 
umbilical tract as in the type, the latter sometimes of a ereyish-green 
colour. Alt. 14:5-16, diam. 16-17 mm. 
4ab.—Sumner, Lyttelton, Banks’ Peninsula to Dunedin. Under 
stones near low-water mark; rather scarce. 
Sect. CHLORODILOMA, Pilsbry, 1889. 
15. Monoponra crinrra (Philippi). 
Trochus crinitus, Philippi: Zeitschr. Malak., 1848, p. 108. 
Trochocochlea mimetica, Hutton: Journ. de Conch., 1878, p. 82; Man. 
New Zealand MolL., p. 96. 
Monodonta mimetica, Hutton: Proc. Linn. Soc. New South Wales, 
vol. ix, p. 368. 
Monodonta crinita, Phil. : Pilsbry, Man. Conch., ser. 1, vol. xi, p. 111, 
pl. xxii, figs. 41-4, 
