SUTER: NEW ZEALAND TROCHID 2. 962 
— Trochus acinosus, Gould: U.S. Explor. Exped., Moll. p. 179, fig. 217. 
| Prochus fulvolabris, Hombr. & Jacq. : Voy. Pole Sud, Zool. vol. vy, 
. p. 56, pl. xiv, figs. 14-16. 
| 
> 
Polydonta tritonis, A. Adams: Proc. Zool. Soc., 1854, p. 182. 
Anthora tritonis (A. Ad.) : Hutton, Man. New Zealand Moll., p. 94. 
~ Geven whorls; five series of granulated spiral liree on penultimate 
whorl. Columella with a deep fold above. Umbilical area with 3-4 
_ spiral ribs. Alt. 20, diam. 19mm. 
_ Hab.—On rocky ground near low-water mark from Whangarei to 
Dunedin. Rather rare in the North, but attaining a larger size. 
Subgen. Crancutus, Montfort, 1810. 
5. Trocuus rincENS (Menke). 
Monodonta ringens, Menke: Moll. Nov. Holl. Spec., 18438, p. 14, 
No 58 (not IL ringens, Philippi, 1846). 
Trochus ringens (Menke): Philippi, Conch. Cab., p. 285, pl. xxxvi, 
fig. 1; Fischer, Coq. Viv., p. 218, pl. lxxi, fig. 1; Pilsbry, 
Man. Conch., ser. 1, vol. xi, p. 81, pl. xi, figs. 49, 50. 
Shell perforate, conical; whorls 7, the first smooth, yellowish, 
following planulate, separated by canaliculate sutures, maculate with 
chestnut and white, spirally cingulate above with four elegantly granu- 
late ridges, the upper and lower larger, last whorl acutely carinated ; 
base slightly convex, ornamented with 8-9 granose cinguli; aperture 
rhomboidal, oblique, narrow; basal margin sulcate - denticulate ; 
columella strong, oblique, terminating below in a large tooth, ringent 
above; columella callous, ringent, plicate. Alt. 10, diam. 11mm. 
(Fischer). Sometimes the altitude exceeds the diameter. 
My specimen from Mokohinau Island, which agrees in every respect 
with Fischer’s excellent description, measures 12 X 10°90 mm. 
Hab.—Cape Maria van Diemen (C. H. Robson); Mokohinau I. 
(caretaker of the lighthouse). 
This is a new addition to the fauna of New Zealand. In Hutton’s 
Man. New Zealand Moll. Clanculus variegatus, Adams, is mentioned, 
loc. Auckland (?), but in his revision (1884) it is omitted from the 
list of New Zealand mollusca. Whether Zrochus ringens was 
erroneously taken for 7. varvegatus or not, 1 do not know. 
Genus MONODONTA, Lamarck, 1801. 
Subgen. Dimoma, Philippi, 1849. 
Sect. NEopILoMA, Fischer, 1885. 
6. Monoponra Airutors (Gmelin). 
Trochus Aithiops, Gmelin: Syst. Nat., 18th ed., p. 3596, No. 32. 
Trochus Zealandicus, Quoy & Gaim.: Voy. Astrolabe, Zool. vol. 11, 
p. 257, pl. lxiv, figs, 12-19. 
