238 MOLLUSCA. 
Figure 290, shell, with the animal as in crawling; 290 a, disk of 
the foot. 
TURBINELLA AMPLUSTRE (KIENER); Iconog. &c., pl. 20, f. 2.  Buc- 
ctnum amplustre, Marryns; Univ. Conch., pl. 3. Murex amplustre, 
Cuemnitz; Conch., pl. 191, f. 1841. 
ANIMAL with the head small, compressed ; tentacles short, robust, 
cylindrical, with the eyes on the summit of an enlargement about mid- 
way from base. Siphon sub-pyramidal, not dilated at tip. Foot 
oblong, with a transverse fissure anteriorly, advancing so as to conceal 
nearly all the head while crawling. Colour dark maroon-red, the 
mantle somewhat paler, and the body sparsely dotted white; foot 
beneath, clear cherry-red, paler at the centre. Operculum dark 
coloured, unguiform. 
The motions of the animal are sluggish, and when at rest the foot 
assumes nearly a square form. [J. P. C.] 
Found alive at Honden Island, Paumotu Group. 
Figure 289, the animal, with an outline of the shell. 
TURBINELLA ARMATA (BropERIP), Proceed. Zool. Soc., 1533, p. 7. 
Reeve; Conch. Icon., pl. 5, f. 29. 
Animat above pale flesh-colour, finely mottled with purplish ; 
siphon and locomotive disk salmon-coloured ; eyes on a bulbous expan- 
sion near tip of tentacles. Operculum yellowish. Shell not carried 
in so elevated an attitude as in T. cornigera. 
Found at Honden Island, Paumotu Group. Couthouy. 
Figure 291, the animal, with the shell, as when crawling. 
The animals of Turbinella, so far as known, are more or less red, 
and in some of them the locomotive disk is intensely red. So re- 
markable is this, that we may almost regard it as a generic character. 
