THE OSTEACODA. 311 



be far more a mesoplanktonic form, and not to come into such direct competition with 

 magna, especially as its oldest or " lophura ' stage was probably purely mesoplanktonic. 



Of the three species of the w^o^^^s-group, two were so scarce that no inference can be 

 drawn. The imbricata-grou]) was rejiresented by Stage II. of imbricata and ametra : 

 these apparently overlapped in the mesoplankton, but the j)lurimum of ametra seemed to 

 be about 500-400 fm., and 300 fm. to be its upper limit, while imbricata rose into the 

 epiplankton at night, and its real centre was probably somewhere in the upper 

 300 fathoms ; although overlapping, these tw^o seemed to have different centres of 

 distribution. 



In summary — the only closely allied species which seemed to come into direct 

 competition were magna and zetesios. 



VI. GENERAL LIST OF SPECIES AND SPECIMENS BY 

 HAULS AND DEPTHS. 



With the exception of the first two (27 «, 36 I) the list has been confined to comparable 

 hauls. The number of specimens between and 100 fathoms has been multiplied by a 

 time-factor, where necessary, to bring all to the standard one-hour haul ; the numbers 

 below 100 fathoms are actual numbers. The columns headed " Totals " include broken 

 specimens, indeterminable larvae, and eight species which occurred but seldom; the 

 captures of these eight wnll be found recorded in the text. 



