CAUSES OF PATCHINESS 



225 



throughout every known phase of its development from its earliest deep-living Naupliar and Meta- 

 naupliar appearance until it reaches the adult state. 



Among the material taken in the vertical nets there are 308 samples of larval krill gathered at all 

 levels traversed between 1500 m. and the surface and covering all twelve stages of the larval life-cycle. 

 The number and stage frequency of the larvae in each sample have been determined and the principal 

 results of these determinations, disregarding in most instances samples totalling only one or two 

 larvae, are shown in Figs. 32-7. Throughout these diagrams, which are arranged in order of 

 advancing time, the stage frequency is expressed as a percentage of the total larvae in each sample, 

 the number of individuals^ upon which the frequency in each instance is based being shown by the 

 figures below. 



'^ In most instances this number was in fact the total sample, although in some few, where the gatherings were very large, 

 it was based on a fraction. 



25 DM 



