CHAETOGNATHA COLLECTED BY STEAMER ALBATROSS. 277 



EXPLANATION OF PLATES. 



[All figures drawn with camera lucida.J 

 Plate 34. 



Fig. 1. Sagitta philippini, new species. X 18. 



2. Anterior teeth and few of posterior teeth of S. philippini. X 250. 



3. Vestibular ridge of S. philippini. X 250. 



4. Seizing jaws of S. philippini. X 800. 



Plate 35. 



Fig. 5. Sagitta pulchra Doncaster. X 8. 



6. Sagitta bedoti Beraneck. X 8. 



7. Sagitta ferox Doncaster. X 8. 



8. Sagitta decipiens Fowler. X 18. 



9. Sagitta neglecta Aida. X 18. 



Plate 36. 



Fig. 10. Eukrohnia richardi Germain and Joubin. X 6. 



11. Pterosagitta draco (Krohn). X 25. 



12. Pterosagitta draco with collarette partly torn away and with no vestige of 



ovary or seminal vesicle. X 25. 



13. Pterosagitta draco with fully mature ovaries and with collarette almost 



entirely missing. X 25. 



Plate 37. 



Fig. 14. Teeth of Eukrohnia hamata ('Mobius). X 100. 



15. Teeth of Eukrohnia richardi Germain and Joubin. X 100. 



16. Vestibular ridge of Sagitta minima Grassi. X 400. 



17. Seizing jaw of Sagitta minima. X 800. 



18. Portion of vestibular ridge and posterior teeth of Sagitta decipiens Fowler. 



X 400. 



19. Vestibular ridge of Sagitta pulchra Doncaster. X 400. 



20. Vestibular ridge of Sagitta bedoti Beraneck. X 400. 



21. Vestibular ridge of Sagitta ferox Doncaster. X 400. 



22. Seizing jaw of Sagitta decipiens Fowler. X 800. 



23. Seizing jaw of Sagitta pulchra Doncaster. X 800. 



24. Seizing jaw of Sagitta bedoti Beraneck. X 800. 



25. Seizing jaw of Sagitta ferox Doncaster. X 800. 



26. Seizing jaw of Eukrohnia richardi Germain aDd Joubin. X 800. 



27. Seizing jaw of Eukrohnia hamata (Mobius). X 800. 



Plate 38. 



Fig. 28. Posterior extremity of a small mature Sagitta enflata Grassi. X 25. 



29. Posterior extremity of a mature Sagitta minima Grassi. X 25. 



30. Ventral view of anterior extremity of Sagitta bedoti Beraneck. X 50. 



