Plate V. 



Enlarge- 



Fig. 1—4. Metacalanus Aurivillii Cl., female. ™™*- 



s 1. Natatory leg of the 1st pair 500. 



» 2. » » » » 3d pair 500. 



» 3. Fifth pair of legs 500. 



» 4. Abdomen and furca 150. 



» 5, 6. Metacalanus Aurivillii Cl., male. 



» 5. Fifth pair of legs 500. 



» 6. Left antemia of the 1st pair 270. 



» 7 — 18. Olthona rigida Giesbr., female. 



» 7, 8. Outline, dorsal and lateral 80. 



» 9. Antenna of tbe 2nd pair 270. 



» 10. » » » 1st pair 270. 



» 11. Masticatory apparatus of the mandible 500. 



» 12. Mandible 500. 



» 13. Maxilliped of the 1st pair 500. 



»14. » j> » 2nd pair 500. 



» 15. Maxilla 500. 



» 16. Furca 270. 



» 17. Natatory leg of the 1st pair 270. 



» 18. Re 3 of tbe 3d pair of natatory legs 500. 



» 19, 20. Olthona rigida Giesbr., male. 



» 19. Outline (dorsal) .' 80. 



» 20. Right antenna of the 1st pair 270. 



