40 C. HEDLEY. 



left valve to extract the meat. 1 The sand in which the 

 Donax lives is coarse and uneven, I find that the grains are 

 usually half a millimetre in diameter, but vary from a 

 quarter to a whole millimetre. A similar station is occupied 

 in New Zealand by Mesodesma, 2 which from an unlike 

 stock has acquired a general superficial resemblance. 



In the summer a hermit crab Diogenes custos (fig. 6) 

 makes its appearance in the surf zone of the sand beach. 



,\,\\\\\\ v 





<^ -=" \' 



\V 



..S^-^O" \ N 







#Cv\* 









.-=-■%" ^C ,v\W 





.3%-^C.A'W 





.•ViC; V \\V>^' 

























Fig. 7. The sand-beach worm Onuphis teres. 



1 North, Nest and Eggs Australian Birds, iv, 1913, p. 261. 

 2 Bell, The Wilds of Maoriland, 1914, p. 23. 



