8UTER : NEW ZEALAND TROCHID-E. 205 



Shell orbicular-conoid, depressed, lustreless, purjilisli-Llack, witli or 

 without yellow spots. Suture more or less distinctly margined below. 

 Spiral lira3 of wliorls distinct or almost obsolete. Last whorl angulatc 

 around the periphery ; body-whorl sometimes biangulate. Outer lip 

 black-edged, followed by a narrow opaque white baud, which runs as 



Portion of radula of Monodonta coracina (Troscli.). 



a silvery stripe over the umbilical tract parallel to the columella, and 

 unites again with the upper lip, thus forming a complete circle. 

 "Umbilical tract bounded on the outer, lower margin by green, grey, or 

 brown. Alt. 10-13, diam. 11-18 mm. A large conic specimen from 

 Lytteltou measures 17 X 17 mm. 



Hah. — Wellington and Lyttelton Harbours, Sumner (H. S.). Under 

 stones on sandy beaches above low-water mark. 



11. Monodonta excavata (Adams & Angas). 



Trochococldea excavata, Ad. & Aug.: Proc. Zool. Soc, 1864, p. 37; 



Hutton, Man. New Zealand Moll., p. 97. 

 Diloma excavata (Adams) : Hutton, Trans. New Zealand Inst., vol. xv, 



p. 126, pi. XV, fig. F (radula). 

 Monodonta excavata (Ad. & Aug.) : Hutton, Proc. Linn. Soc. New 



South AVales, vol. ix, p. 368 ; Pilsbry, Man. Conch., ser. i, 



vol. xi, p. 109, pi. XXXV, figs. 1-3. 

 Trochococldea constricta (Lamk.) : Hutton, Journ. de Conch., 1878, 



p. 33. [Not of Lamarck.] 



Shell small, depressed-conic, greyish-green, minutely maculated 

 with dark-olive, apex but seldom eroded. Last whorl convex above, 

 flattened beneath, and carinate at the periphery. Lira3 distinct only 

 on the base. Outer lip edged with black. Umbilical tract broad, 

 concave, bounded by light-brown. Alt. 5, diam. 6 mm. Specimens 

 from Greymouth measure 10 X 11^ mm. 



Hah. — West coast of ll^e^Y Zealand ; Manukau Heads ; Cape Egmout ; 

 Greymouth. 



12. Monodonta lttgubeis (Gmelin). 



Trochus luguhris, Gmelin; Syst. Nat., 13th ed., p. 3583, No. 104. 

 Trockus cmgulatus, Quoy & Gaim. : Yoy. Astrolabe, Zool. vol. iii, 



p. 259, pi. Ixiv, figs. 16-20 (not cingidatus, Brocchi 



nor Menke"). 



