SITTER : NEW ZEALAND TROCHID.^. 263 



Monodonta reticularis, Grav : DicfLcnbacli's "New Zealand," vol. ii, 



p. 238. 

 ? Lalio concolor, A. Adams: Proc. Zool. Soc, 1851, p. 180. 

 Biloma ^thiops (Gmel.) : Hutton, Man. New Zealand Moll., p. 95 ; 



Hiitton, Trans. New Zealand Inst., vol. xv, p. 125, pi. xv, 



fig. A (radula). 

 Mojiodonta yEthiops (Gmel.) : Hutton, Proc. Linn. Soc. New South 



Wales, vol. ix, p. 365 ; Pilsbry, Man. Conch., ser. i, 



vol. xi, p. 98, pi. xix, figs. 99-100; pi. xx, fig. 19; 



pi. 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. 25-33, diam. 25-30 mm. 



Ilab. — On rocks near high-water mark ; common throughout New 

 Zealand, Chatham Is., Auckland Is. 



7. Monodonta morio (Troschel). 



Troclms morio, Troschel in Philippi : Conch. Cab., p. 142, pi. xxiv, fig. 3. 

 Monodonta mclaloma var, guttata, Hutton : Proc. Linn. Soc. ^e\y 



South AYales, vol. ix, p. 367. 

 Monodonta morio, Trosch. : Pilsbry, Man. Conch., ser. i, vol. xi, pp. 102, 



105, pi. 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. Urate band, and 

 inside chis 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 Eanks' Peninsula. 



8. Monodonta atrovirens (Philippi). 



Troclms atrovirens, Philippi: Conch. Cab., p. 148, j)!. xxiv, fig. 12; 



Fischer, Coq. Viv., p. 373, pi. cxiv, fig. 1. 

 Monodonta atrovirens, Phil. : Pilsbry, Man. Conch., ser. i, vol. xi, 



p. 110, pi. xxii, figs. 48-50. 



Shell orbiculatc, conoidal, shining, greenish-black, usually faiucly 

 marked with yellowish spots, spirally sulcate, sulci 7-9 on the 

 penultimate whorl. Sutures submargined below. Last whorl much 

 tlilated, rounded at the periphery. Outer lip edged with green or 

 blackish-green. Columellar callus broadly expanded, bouuded 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-Avater mark. 



