PLATE L I X. 



Paramekodon inflatus, female. 



Figure 



1. Shell, seen from left side, x 30. 



2. ,, ,, ,, above, x 30. 



3. Antennule. {a) Portion of a sensory filament more highly magnified. 



4. Secondary branch of antenna. 



5. Mandible and palp. 



6. Maxilla of first pair, (a) One of the shorter spines more highly magnified. 



7. ,, second pair. 



8. Teeth of the same more highly magnrled. 



9. MaxUla of third pair. 



10. Caudal am' 



Streptoleheris rectirostris. 



11. Shell, seen from left side, x 30. 



12. „ „ ,, above, x 30 



13. ,, ,, „ behind x 30. 



Tetragonodon erinaceus. 



14. Shell, seen from left side, x 30. 



15. ,, ,, „ above, x 30. 



Streptoleberu favosa , 



16. Shell, seen from left side, x 40. 



17. „ „ „ below, „ 



18. „ „ „ front, „ 



Asterope elliptica. 



19. Antennule of female. 



20. Mandibular foot of female. 



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