LIST OF PLATES 



Toface 

 page 



Thomas Henry Huxley, 1857. From a photograph by Maull and 



Polyblank Frontispiece 



Plate i. Description of the Animal of Trigonia from Actual 

 Dissection. 



Figs. 1-6 . . . . . . 8 



Plate 2. On the Anatomy and the Affinities of the Family of 

 THE Medusa. 



Figs. 1-17 — Thaumantias — Mesoiiema — Oceania . . 29 



Plate 3. On the Anatomy and the Affinities of the Family 

 of Medusae. 

 Figs. 18-28 — Phacellophora — Rhisostoma mosaica ... -r . .30 



PL.4.TE 4. On the Anatomy and the Affinities of the Family 

 OF THE Medusa. 

 Figs. 29-49 — Rhiznstoma mosaica — Ccphea ocellata — Diphydce — Serhi- 



laridcE -32 



Plate 5. Observations upon the Anatomy and Physiology of 

 Salpa and Pyrosoma. 

 Figs. 1-9 — The Structure of the Salpa . . . . . .78 



Pl.ate 6. Observations upon the Anatomy and Physiology of 

 Salpa and Pyrosoma. 



Figs. 1-8 — The Structure of the Salpa 78 



Plate 7. Observations upon the Anatomy and Physiology of 

 Salpa and Pyrosoma. 

 Figs, i-io — The Anatomy of Pyrosoma ... . ... 78 



Plate 8. Remarks ltpon Appendicularia and Doliolum. 



Figs. 1-9 — Appendicularia flagellum — Doliolum denticulatum ... 78 



Plate 9. Remarks upon Appendicularia and Doliolum. 



Two Genera of the Tunicata — Sectional Diagrams of the Tunicata . . 78 

 Plate 10. Zoological Notes and Observations on bo.ard H.M.S. 

 " R.attlesnake " during the years 1846-50. 

 Figs, i-io — The Auditory Organs in the Crustacea . . . . . 82 



Plate ii. Zoological Notes and Observations on board H.M.S. 

 "Rattlesnake" during the years 1846-50. 

 Figs. 1-6 — Th. punciata — Th. nucleata . . . , , , 86 



