230 MOLLUSCA. 
This species, from its variciform plaits, might be regarded as a 
Murex, were it not for its rostrum, and its animal. The form varies 
greatly, as well as the degree of angularity of the whorls; but the 
peculiar lax arrangement of the stages of growth, especially where 
they form the varices, allows of no mistake. 
The animal is very timid, remaining for hours displaying only a 
small portion of the foot; and when fully protruded the head never 
advanced beyond the foot. 
Figure 279, a large specimen, with the animal, as in motion ; 279 a, 
a slender shell, with the plantar disk of the animal, enlarged ; 279 6, 
dorsal view of a curious angular variety ; 279 c, the operculum. 
Fusus pecotor (Putiprr), Abbild. der neuen oder wenig. bekannt. 
Conchylhien, pl. 3, fig. 3. 
Animat pale straw-colour, flecked with white spots on the tentacles 
and sides; foot short, square in front, with a deep, transverse, sub- 
marginal furrow ; tentacles broad at base, eyes near their lower third, 
above which they taper to a point; siphon hardly protrudes beyond 
the shell. 
This animal was found at Orange Harbour adhering to a Mytilus, 
through which it had drilled a hole, about one-twelfth of an inch in 
diameter, and with its proboscis extended nearly an inch, was leisurely 
preying on the animal within, and which it had already half de- 
voured. [J.P.c.] 
Figure 280, shell, with the animal, as in motion. 
Fusus pLumBeus (Pxitippi), Abbild. der neuen oder wenig. be- 
kannt. Conchylien, pl. 1, fig. 3. 
The animal has the whole body of a clear, pale yellow, except the 
tentacles, which are colourless, with a longitudinal, dull-brown line; 
the siphon has a faint yellow tinge, as has also the mantle, which has 
its margin undulating and delicately fimbriated with short, fine, 
