4 NOTES ON THE NATURAL HISTORY OP THE BELL ROCK. 



not until he himself is safely ensconced does he relinquish 

 his grasp. Others, again, may be seen prospecting the interior 

 of a shell. Extended at full length on the top of the shell, with 

 their claws groping within, one is forcibly reminded of a 

 person " guddling " for trout. Should there be any portion 

 of the original whelk remaining in the shell, this, after 

 repeated tuggings, is cleared out. The tail is then inserted, 

 and the whole body withdrawn into the shell, providing it 

 is large enough ; if not, he stands a bad chance of being 

 evicted by the next pugnacious house-hunter. 



