CONTENTS 



Page 



Introduction 1 



Field methods 2 



Laboratory methods 3 



Material studied ._ . j^i^v.^,,. 6 



The Arctic Spinocalanidae .._. jiw. ; .■ . I. ■.- 9 



Arctic hydrography 9 



Vertical distribution of Arctic Spinocalanidae 9 



Family Spinocalanidae Vervoort, 1951 J 13 



Description 13 



Female 13 



Male 14 



Remarks 14 



Key to the Genera of Spinocalanidae 15 



Genus Spinocalanus Giesbrecht, 1888 15 



Description 15 



Key to the species of Spinocalanus 16 



1. Spinocalanus abyssalis Giesbrecht, 1888 17 



Description 17 



Remarks 19 



Distribution 20 



2. Spinocalanus longicornis Sars, 1900 20 



Description 24 



Remarks 25 



Distribution 25 



(3. Spinocalanus schaudinni Mrazek, 1902) 26 



4. Spinocalanus magnus Wolfenden, 1904 26 



Description 26 



Remarks 28 



Distribution 29 



5. Spinocalanus antarcticus Wolfenden, 1906 30 



Description 30 



Remarks 35 



Distribution 35 



(6. Spinocalanus major Esterly, 1906) 35 



(7. Spinocalanus latifrons Sars, 1907) 35 



8. Spinocalanus hirtus Sars, 1907 35 



Description 35 



Remarks 36 



9. Spinocalanus spinosus Farran, 1908 36 



Description 36 



Remarks 36 



Distribution 37 



10. Spinocalanus horridus Wolfenden, 1911 37 



Description 37 



Remarks 40 



Distribution 41 



(11. Spinocalanus giesbrechti Brady, 1918) 41 



Remarks 41 



12. Spinocalanus validus Sars, 1920 41 



Description 42 



Remarks 42 



Distribution 42 



13. Spinocalanus angusticeps Sars, 1920 42 



Description 43 



Remarks 43 



Distribution 43 



(14. Spinocalanus caudatus Sars. 1920) 43 



iii 



