202 NEW Oil IMPEKFECTLT-KNOAVN OSTEACODA. 



PLATE XXI. 



Philomedes debilis, ,^ (p. 186). 



Fig. 1. Outline of shell seen from right side, X 55. 



2. „ „ above, x 55. 



3. Margin of shell round antennal sinus, x 110. 



4. Antenna seen from side, X 84. 



5. One of the caudal laminae, X 120. 



Asterope oculata (p. 179). 



Fig. 6. Shell of male seen from left side, x 40. 



7. „ „ above, x 40. 



8. Outline of shell of female seen from left side, x 40. 



9. Antennule of female, x 100. 



10. Internal branch of antenna of male, x 84. 



11. Mandibular foot, x 100. . 



12. One of the caudal laminae of male, x 84. 



13. ,, ,, ungues of iemale, x 240. 



Pyrocypris americana, $ (p. 185). 



Fig. 14. Outline of shell, seen from left side, x 28. 



15. Base of one of the principal antennular setae, x 240. 



16. Internal (rudimentary) branch of antenna, x 100. 



17. Mandibular foot, X 84. 



18. Apex of vermiform limb, with setae, x 240. 



19. Caudal lamina, x 100. 



Cyclasterope fascigera (p. 181). 



Fig. 20. Shell of male, seen from right side, x 10. 



21. „ „ above, x 10. 



22. Outline of shell of female, seen from left side, x 8. 



23. „ „ „ above, X 8. 



24. Terminal joints and setae of antennule of male, X 34. 



25. Joints of antenna of male, x 40. 



26. Internal branch of antenna of male, X 40. 



27. Mandibular foot of male, x 26. 



28. Masticating process of mandible of female, x 120. 



29. Caudal laminae of male, X 26. 



30. Marginal armature of unguis of male, x 240. 



31. „ ,y „ female, x 240. 



Cypridina granulosa, ? (p. 184). 



Fig. 32. Outline of shell of female, seen from left side, x 20. 



33. „ „ „ above, x 20. 



34. Internal branch of antenna, x 150. 



