TEREBELLA. 18] 
CHAPTER VIIL 
TEREBELLA. 
The preceding subjects, the Sabella alveolaria and Sabella belgica, 
conduct us naturally to the Terebella. Their habits in so far agree most 
intimately, that the organs which all possess in a modified form, are ap- 
plied to the construction of an artificial dwelling, for the shelter and 
safety of their unprotected bodies. 
All are architects, nor of contemptible skill, as we shall find on con- 
templating their mechanical labours. 
The instinct of animals being most conspicuously evinced in the 
pursuit of prey, the care of their young, and the construction of an arti- 
ficial dwelling, those apparently the readiest to suffer external injury 
should enjoy this latter faculty in the highest perfection. 
Yet, according to human observation, many of the weakest are 
neither the best protected, nor have they the greatest facilities for secur- 
ing themselves from danger. 
The collection, preparation, arrangement, and combination of various 
materials in framing a safe and permanent habitation unite in a peculiar 
property, sparingly conferred by Nature on her creatures. If any, seem- 
ingly more defenceless than the favoured few, be left exposed, by denial 
of this great prerogative in our eyes, it is for some inscrutable purpose, 
which we cannot discover, or which, if discovered, we could not appre- 
ciate. We may uot arraign the Omnipotent decree invisibly governing 
the animated world. All that may be reiterated concentrates in the 
