246 MOLLUSCA. 
of all these, and the only variation of the surface is a series of zones of 
dirty brown and dead yellowish-white; but the aperture is always of 
the same chocolate-colour, and the outer lip always has a cream- 
coloured margin. 
Inhabits New Zealand. 
Purpura succincTa (Martyns), Lamarck; Anim. sans Vert., x. 
63. Buccinum orbita, CHEMN.; tab. 154, f. 1471-72. Purpura orbita, 
Sowersy ; Genera, f. 2. 
AnimaL above deep-orange, shaded with dusky; foot beneath, pale 
cream-colour; head and tentacles large, pale, with transverse cres- 
centic lineations; siphon pale, tipped and margined red. 
Figure 1 of Plate 31, of the Voyage of the Astrolabe, is probably 
intended for the same species, but the colour is there represented of a 
uniform dusky brown. 
Pourrura eLoNncaTA (BuatnvitLe), Nouv. Ann. du Mus,, i. 221, 
pl. 10, f. 11. Purpura fenestrata, Quoy and Gaim.; Voy. de |’ Astrol., 
pl. 37, f. 15,16. Desnayes; in Anim. sans Vert., x. 90. 
ANIMAL pea-green, bedewed with grass-green points, darkest above, 
but not so distinctly pointed ; tentacles proportionally long. 
Found at Metia or Aurora Island, Paumotu Group. 
Figure 304, locomotive surface of the animal; 304 a, animal, with 
the shell, as in motion. 
Purpura vioLacea (Ktener), Iconog., pl. 19, f. 57. Pyrula nere- 
toidea, Lamarck. Purpura nerttoidea, Quoy and Gaim.; Voy. de 
l’Astrol, pl. 38, f. 22-24. Anim. sans Vert. ix. 519. 
Anat above bright reddish-viclet, the mantle coloured like the 
aperture of the shell; surface of the foot, siphon and tentacles cream- 
