8 
extremity, they remind us of the conductor of a weak 
electrifying machine, while in action ; but adhere to the 
fingers. It often protrudes its stomach and expands it over 
its whole surface ; at which time, if a fresh oyster or muscle 
be taken from its shell, and thrown to it, it envelops and 
draws it into its body; from whence, in a few days, it is 
again discharged by the same channel, altered and very 
much diminished. If the food given it be not quite fresh, 
it throws it to a distance and appears uneasy. 
Body greenish above, variegated with orange-coloured 
stripes, and covered with minute white specks ; when closed, 
roundish, waned, flat at the base with a narrow rim, grey 
beneath, and formed for attaching itself to stones. Mouth 
soft, red, surrounded by 138 cirrhi of a light rose-colour, 
cylindrical, perforated at the end. A red line runs nearly 
to the base of each, and is lost towards the mouth. Stomach 
light brown, plaited. 
