SPONGES. 



17 



Those from the beach are loaded with sand, spines of the 

 common and purple heart urchins, bristles of the sea-mouse : 

 and many starfishes seek refuge in tlieir interstices. 



11. p. 373. 



Chalina limbata, Bowerb. ; vol. 



Not uncommon under stones in tidal pools, either coating 

 the sm-face of the stone or attached to the stems of Corallina 



officinalis. 



R.M. p'mxit 



D 



