Plate III. 



Fig. 1. — Oikopleura longîcauda Vogt. Eight side view of the trunk. 

 Fig. 2. — Ditto. Left side view of the trunk, showing the internal organs. 

 Fig. 3. — Ditto. Right side view of tlie trunk, showing the two hoods. 

 Fig. 4. — Ditto. Front view of the mouth showing the ciliated band of 



the lip. 

 Fig. 5. — Ditto. Entire body from behind. 



Fig. 6. — Ditto. Dorsal view of the alimentary canal and genital glands. 

 Fig. 7. — Ditto. Ventral view of the3 alimentary canal and genital glands. 

 Fig. 8. — Oikopleura fmiformis Fol. Left side view of the trunk. 

 Fig. 9. — Ditto, Eight side view of the trunk, to show the internal organs. 

 Fig. 10. — Ditto. Left side view of the alimentary canal. 

 Fig. 11. — Ditto. Dorsal view of the alimentary canal. 

 Fig. 12. — Ditto. Entire budy from behind. 



Fig. 13. — Oikopleura vicfjastoma, nov. sj). Left side view of the trunk. 

 Fig. 14. — Ditto. Left side view of the trunk, to show the internal 



structure. 

 Fig. 15. — Ditto. Entire body from behind. 

 Fig. 16. — Ditto. Eight side view of the alimentary canal. 

 Fig. 17. — Ditto. Genital glands from behind. Testis lobed ; fiat ovary 



lying over it. 

 Fig. 18. — Ditto. Ventral view of the trunk, to show the atrial a})erture 



{oas.). 



