PLATE XXXI. 



Figs. 1-22. TJn/saiiOjKxJa tricusjndata, Milne-Edwards. 



(Development.) 



Fig. I. Larva in second Calyptojiis stage, from left side ; highly magnified. 



Fig. 2. I.arva in last Caly]itopis stage, from liglit side. 



Fig. 3. Larva in first Furcilia stage, from left side. 



Fig. 4. Same, from above. 



Fig. .5. Larva in second Furcilia stage, from right side. 



Fig. 6. Larva in second Cyrtopia stage, from left side. 



Fig. 7. Eyes of a larva in last Calyptopis stage. 



Fig. 8. Eye of a larva in second Furcilia stage. 



Fig. 9. Same part of a larva in second Cyrtopia stage. 



Fig. 10. Anterior part of body of a young Th ijsanopoda, from above. 



Fig. 11. Same part, from left side. 



Fig. 12. Tip of lateral protuberance of eye, with seven corneal lenses. 



Fig. 1 3. Mandible of a larva in last Calyptopis stage. 



Fig. 1 4. Maxilla of first pair of same. 



Fig. 15. Maxilla of second pair of same. 



Fig. 16. Maxilliped of same. 



Fig. 17. Extremity of tail of same larva, with telson and right uropod, from above. 



Fig. 18. Telson of a larva in first Furcilia stage. 



Fig. 1 9. Extremity of telson of a larva in second Furcilia stage. 



Fig. 20. vSame part of a larva in first Cyrtopia stage. 



Fig. 21. Same part of a larva in last Cyrtopia stage. 



Fig. 22. Same part of a young Thi/sanopoda. 



Figs. 23-29. Ncmatoscelis rostrata, G. 0. Sars. 

 (Development.) 



Fig. 23. Larva in Furcilia stage, from right side ; highly magnified. 



Fig. 24. Larva in a subsequent Furcilia stage, from left side. 



Fig. 25. Larva in Cyrtopia stage, from right side ; magnified about twenty-four times. 



Fig. 26. Legs of first and second pairs of the larva represented in fig. 23, isolated, and more highly magnified. 



Fig. 27. Telson of same larva, from above. 



Fig. 28. Extremity of telson of the larva represented in fig. 24. 



Fig. 29. Same part of a larva in Cyrtopia stage. 



Figs. 30-31. Euphausia sp. (1). 



(Larval stage.) 



Fig. 30. Larva in first Furcilia stage, from right side ; magnified about eighteen times. 

 Fig. 31. Extremity of tail of same larva, with telson and right uropod, from above. 



