324 TRANSACTIONS LIVERPOOL BIOLOGICAL SOCIETY. 



They are monotonie plankton hauls, such as are 

 characteristic of the vernal phytoplankton maximum in 

 the Irish Sea, and illustrate well the wide range in 

 quantity obtained on neighbouring days at that season. 



Fig. 13. Monotonie Zooplankton hauls, from August. 



The five jars in fig. 13 show zoo-plankton hauls taken 

 later in the summer with coarser nets, which had allowed 

 the more minute organisms to escape. These, although 

 not complete samples, are all notable cases of animals 

 that were not generally distributed, but occurred in 

 swarms so as to constitute a monotonie plankton. 



The Food Supply of Marine Animals. 



Most writers who have discussed the conditions of 

 life in the sea have regarded marine animals as dependent 

 directly or indirectly upon other animals and plants as 

 organised food, and have considered them all as dependent 



