84. Tlie largest fan worm in English waters. Bispira 

 volutacornii. with an elegant donhle spiral of tentacles 

 protruding from the tube. (England. D. P. Wilson) 



86 and 87. The honeycomb worm, Sahellaria aheolata, 

 forms honeycombs of tubes (below) on wave-washed 

 rocks near sand\' bottoms that furnish the grains with 

 which the tube is strengthened. At low tide the worms 

 draw in their heads and stopper their tubes with two 

 front feet ( see enlarged portion of colony at right ) . 

 {Widemouth Bav, England. D. P. Wilson)' 



85. The sea mouse, Aphwditc aculcota. a scale worm, is liere laid on 

 its back to show the bristle-bearing, segmented appendages that line 

 both sides of the liody. It is 2 inclies wide and up to 6 inches long, 

 and the back is covered with matted liristles. Found on European 

 and American shores, in sand\' mud. with only the hind end protrud- 

 ing. (Plymouth, England. Ralph Buchsbaum) 



