perfectly at reft, and undifturbed, it appears of an 
oblong fhape; but when it prepares to alter its fitu- 
ation, it protrudes from mod parts of its body an 
infinite number of tentacula or feelers, in fuch a 
manner as to appear befet with foft fpines. It alfo 
is capable of contracting itfelf at pleafure into a 
globular fhape, or fiightly oval. Its colour is com¬ 
monly a beautiful mixture of red and white, but in 
this refpeCl it varies confiderably, according to the 
circumftances of vigor, the feafon of the year, &c. 
&c. It is not unfrequently found on the coafts of 
the northern feas. 
