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DISCOVERY REPORTS 



(p. 301, Fig. 70 and p. 310, Fig. 74), the earliest risings are known to be taking place on a massive 

 scale and where deep, very recently hatched, larvae would then I think be expected, much more 

 regularly perhaps, to be taken in our nets. Even so this is not to say that hatching is not a very deep 



Fig. 30. Development of sinking eggs in shelf and oceanic water showing how hatching in the shallower conditions gives rise to 

 occurrences of Nauplii and Metanauplii unusually close to the surface. The Nauplii and Metanauplii are partly diagrammatic. 



event. On the contrary I believe that, as a major phenomenon, it must occur far below 1500 m. and 

 would put it in the cold deep stratum below 2000 m. Our repeated failure to strike even rare specimens 

 of the First Nauplius between 1500 and 1000 m. provides strong additional evidence of how deep in 

 fact the hatching must be. 



The full significance of this deep, and for all practical purposes exclusively oceanic, hatching will 

 be dealt with presently. In the meantime attention is directed to certain unusual features presented by 

 the occurrence and vertical distribution of the very few Nauplii and Metanauplii that have thus far 



