The works of Francis Maitland Balfour, Volume 3 (of 4)
CHAPTER II. UROCHORDA. Pp. 9-39.
_Solitaria_, pp. 9-23. Development of embryo, pp. 9-15. Growth and structure of free larva, pp. 15-19. Retrogressive metamorphosis, pp. 19-23. _Sedentaria_, p. 23. _Natantia_, pp. 23-28. _Doliolidæ_, pp. 28, 29. _Salpidæ_, pp. 29-34. _Appendicularia_, p. 34. Metagenesis, pp. 34-38.