BARNACLES. 
223 
CHAPTER XXIV. 
Cirripedia (Barnacles). 
Whoever is familiar with the rocky coasts of our sea-girt 
isle, is aware that that belt of rock which is included be- 
tween the levels of high and low tide, is ordinarily studded 
with millions of little shelly cones, often packed so closely 
together, that there is not proper standing room for them, 
so that the individual cones are forced out of their proper 
shape, and compelled to rise into a lengthened distorted 
form. 
He may chance, moreover, to have seen a log of timber 
drifted in from the wide ocean, or tho bottom of a ship 
just returned from a twelvemonth’s tropical voyage, either 
of which has probably displayednumbersof singular beings, 
which he may be disposed to associate with the Bivalve 
Mollusca that he finds on tho sandy beach. For they con- 
sist of a flattened shell, composod of many pieces, usually 
of a blueish-white hue, marked with orange, but set at 
the end of a more or less lengthened stem of a wrinkled 
gristly substance, by which it is firmly attached to the sub- 
merged timber. 
Now the stony cone seated on the rock, and the delicate 
multivalve swinging at the end of the long footstalk, are 
members of the same class — they are both Barnacles. In 
