286 CRUSTACEA, ECHINODERMS, ETC. 



of a bright colour. This marine worm also constructs 

 its long and elegantly convoluted tube by means of 

 cemented grains of sand. 



In addition to these our public aquaria have Sabcl- 



Fig. 218. 



"Sea-mouse" (Aphrodita aculcata). a. Under surface, b. Side view. 



laria, Eunice, Aphrodita, Polynoe, Nereis, Pontobdclla, 

 Arenicola (or "lob-worm "), Protula, Spirorbis, Phlly- 

 doce (a worm of attractive appearance), Eunice, 

 Pectinana, Otkonia, &c. These interesting creatures 



