SUTER : NEW ZEALANB TUOCniD.-E. 267 



Diloma corrosa (Adams) : Huttou, Trans. New Zealand Inst., vol. xv, 



p. 126, pi. XV, lii;'. D (radula). 

 Lahio Uectori, Hutton : Cat. Mar. Moll. New Zealand, 1873, p. 37. 

 TrochocochUa chloropoda, Tate: Zoul. and Tal. Alisc., p. 10 {teste 



Hutton). 

 Monodonta melaloiua (Menkc) : Hutton, Proc. Linn. Soc. New South 



Wales, vol. ix, p. 366. 

 Monodonta melanoloma, Menke : Pilsbry, Man. Concli., ser. i, vol. xi, 



p. 104, pi. 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. 16 mm. 



Uab. — On mud-flats of estuaries in brackish water, Heathcote 

 Estuary, near Christchurch (H. S.). 



Yar. tindulosa, A. Adams. 

 Chhrostoma nndulosum, A. Adams: Proc. Zool. Soc, 1851, p. 182. 

 Por synonymy, see Pilsbry, Man. Conch., ser. i, vol. xi, 

 p. 105, pi. xxii, 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. 



Ilfih. — Sumner to Hunedin. On rocks : not common. 



Var. pluinhea, Huttim. 

 Diloma phunbea, Hutton: Trans. New Zealand Inst., vol. xv (1883), 



p. 126, pi. XV, tig. E (radula). 

 Monodonta niclaloma var. plumhea : Proc. Linn. Soc. New South Wales, 



vol. ix, p. 367 ; Pilsbry, Man. Conch., ser. i, vol. xi, p. 105, 



pi. xxii, figs. 45-7. 



Shell dull-pui'})lish, spire mostly eroded, roughened, last whorl 

 obsoletely lirate. Outer lip edged with black. Columella and 

 umbilical tract as in the type, the latter sometimes of a greyish-green 

 colour. Alt. 14"5-16, diam. 16-17 mm. 



Jlab. — Sumner, Lyttelton, Banks' Peninsula to Dunedin. Under 

 stones near low-water mark ; rather scarce. 



Sect. CHLORODiLOMA, Pilsbrv, 1889. 



15. Monodonta ceinita (Philippi). 



Trochus crinitus, Philippi: Zeitschr. Malak., 1848, p. 103. 

 Trochocochlea mimetica, Hutton: Journ. de Conch., 1878, p. 32; 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. i, vol. xi, p. Ill, 



pi. xxii, ^'j:,^. 41-4. 



