NOTES AND COMMENTS. 



BURROWING MARINE ANIMALS. 



In Dr. Gamble's useful book on animal life, reviewed in 

 these columns recently, a chapter of particular interest relates 

 to the way in which various marine animals burrow in the sand, 

 etc., for protection, and this is illustrated by a block, which the 

 pubhshers kindly permit us to reproduce. Fig a represents 



A Group of Burrowing Animals from a sandy shore. 



the Heart-urchin, shewing its tube feet gathering food ; B = 

 a bivalve (Scrohiciilaria) , shewing the inlet (h) for water and 

 food, and the outlet (a) ; c = the Cockle, shewing inhalent and 

 exhalent tubes ; d = the Mud-clam [My a) , shewing the same ; 

 E = the Lugworm ; F^the Masked Crab, the antennae of which 

 form the inhalent tube. 



1908 September i. 



