263 PROCEEDINGS OF THE MALACOLOGICAL SOCIETY. 
Monodonta reticularis, Gray: Dieffenbach’s ‘‘ New Zealand,” vol, ii, 
| . 238. 
? Labo iaooroH. A. Adams: Proc. Zool. Soc., 1851, p. 180. 
Diloma Aithiops (Gmel.): Hutton, Man. New Zealand Moll., p. 95; 
ee Hutton, Trans. New Zealand Inst., vol. xv, p. 125, pl. xv, 
fig. A (radula). 
Monodonta Atthiops (Gmel.): Hutton, Proc. Linn. Soc. New South 
Wales, vol. ix, p. 365; Pilsbry, Man. Conch., ser. 1, _ 
vol. xi, p. 98, pl. xix, figs. 99-100; pl. xx, fig. 19% 
pl. 1, fig. 12 (radula). | 
With distant narrow spiral black grooves, the intervening tracts — 
flat, black, articulated with white. Outer lip black-edged. Umbilical 
tract very broad, bounded on the outer, lower margin by a chocolate 
streak. Alt. 25-338, diam. 25-30 mm. 
Hab.—On rocks near high-water mark; common throughout New 
Zealand, Chatham Is., Auckland Is. 
7. Monoponta morio (Troschel). 
Trochus morio, Troschel in Philippi: Conch. Cab., p. 142, pl. xxiv, fig. 3. 
Monodonta melaloma var. guttata, Hutton: Proc. Linn. Soc. New 
South Wales, vol. ix, p. 367. 
Monodonta moro, Trosch.: Pilsbry, Man. Conch., ser. 1, vol. x1, pp. 102, 
105, pl. xxxv, figs. 26, 27. 
Shell black, surface rough, apex almost always eroded, with 
irregularly scattered white dots, obsoletely spirally sulcate, 9-10 on 
the penultimate whorl. Umbilical tract broad, with a tongue-shaped 
pearly umbilical impression, bounded by dark-green. Outer lip edged 
with blackish-green, followed by a narrow silvery, lirate band, and 
inside this a broad band of opaque white, the prolongation of the 
columella lip, follows. Very variable in form. Alt. 12-20, diam. 
14-19 mm. 
Hab.—On rocks and under stones near low-water mark, from 
Auckland to Banks’ Peninsula. 
8. Monoponta atrovirens (Philippi). 
Lrochus atrovirens, Philippi: Conch. Cab., p. 148, pl. xxiv, fig. 12; 
Fischer, Coq. Viv., p. 378, pl. exiv, fig. 1. 
Monodonta atrovirens, Phil.: Pilsbry, Man. Conch., ser. 1, vol. xi, 
p- 110, pl. xxu, figs. 48-50. 
Shell orbiculate, conoidal, shining, greenish-black, usually faintly 
marked with yellowish spots, spirally sulcate, sulci 7-9 on the 
penultimate whorl. Sutures submargined below. Last whorl much 
dilated, rounded at the periphery. Outer lip edged with green or 
blackish-green. Columellar callus broadly expanded, bounded by 
green or blackish-green, a distinct tongue-shaped pit at the place of 
the umbilicus. Alt. 9-17, diam. 14-23 mm. 
Hab —Tasman’s Bay; Lyall Bay; Dunedin. Under stones above 
low-water mark. — 
