138 
ANIMAL LIFE ON THE 
landing stage we observed a sprinkling, in a sheltered nook, 
of the common black periwinkle, but in this part we are 
unable to find a single member of that family. Strange to 
say, however, that the pearly top is here in plenty ; nowhere 
else, indeed, have we seen it in such numbers. The limpet 
is also plentiful, but the majority of them are very old 
stagers, and these, with a few scattered purple lips, are all 
the living creatures we can find. But the 
is an interesting creature. Let us immerse him in our glass 
of water and have a peep at him with the lens. The peach- 
coloured oblong foot very soon adheres to the glass, and 
we see, as in the case of his black brother, the periwinkle. 
that the foot is divided into two parts, working in the same 
fashion. The foot of the top, however, displays a beautiful 
arrangement of muscular fibres, set in rows from top to 
bottom; and these, when in motion, follow each other like 
the waves of the sea, and with these he clings to the stone 
with such tenacity that it needs some little force to pluck 
him from his place. On both sides of the foot there are 
three long zebra -stripped feelers, which keep continually 
waving backwards and forwards but what their work is 
we have been unable to ascertain. Immediately behind 
PEARLY TOP 
PEARLY TOP. 
