exterior and longitudinal interior fibres, converging 
at the circular and tendinous base: this sacculus, 
■which is for the reception of the sea-water, is easily 
separable from the rind : it is furnished internally 
with a yellowish visceral parenchyma, formed in¬ 
to intestinal windings ascending from the base up 
the sides of the cavity: the colour of this species is 
orange-red. 
