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BK. G. H. rOWLER — BISCATAN PLANKTON ; 

 Index to the Species. 



I. HALOCrPElD^. 



(1) Conchoecia. 



1. ametra, Midler 



2. brachyaskos, Muller 



3. curta, I/iihhoc/r 



4. daplinoides, Claus 



5. elesaiis, Sars 



6. haddoiii, Brady and Norman. . . 



7. h3"ilo[ihyllum, Clans 



8. imbricata (Bradij, pars), Muller 



9. inermis, Claus 



10. kampta, Muller 



11. lorieata, Claus 



12. magna, Claus 



" A " larviB 



13. procera, Midler 



14. pusilla, M'uller 



15. rhynchona, Miiller 



16. rotundata, Miiller 



17. spinifera, Claus 



18. spinirostris, Claus 



19. tyloda, Miiller 



20. zetesios, sp. n 



21. " B " innomiiiata 



22. " C " innomiaata 



(2) Halocypris. 



23. globosa, Claus 



(3) Archiconohoecia. 



24. cucullat-a, Brady 



II. CrpEiDiNiDa;. 



(4) Cypridina. 



25. castanea, Brady 



(5) Gigantocypris. 



26. pellucida, Miiller 



Systematic. 



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Developmental. 



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Faunistic. 



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I. INTRODUCTION. 



The study of the Ostracoda collected during the 1900 cruise of H.M.S. ' Research ' 

 proved to be an arduous undertaking. Moi'e than 7000 specimens have been identified ; 

 and in more than 3300 specimens the sex has been determined and the antero-posterior 

 length of the shell measured. The results are such that one need not grudge the time 

 and labour involved, for the neglected little family of Halocypridae, by the number of 

 its members and by its presence at (apparently) all depths, afi"ords admirable material for 

 the study of oceanic problems. Thanks to the labours of Professor C. W. Miiller, of 

 Greifswald, the species are now more or less orderly arranged, and the difficulties 

 of manipulation are only serious in the case of the minuter specimens of less than 

 one millimetre. 



