xiv LIST OF PLATES 



To face 

 page 



Plate 12. Report upon the Researches of Prok. Muller into 

 THE Anatomy and Development of the Echinoderms. 

 Figs. I-I I, i.-xiii. — Bipinnaria — Brachiolaria — Tornaria — Atcricidaria 



Sipicnculiis . . • ..... 120 



Plate 13.— Ueber die Sexualorgane der Diphydae und Physo- 

 phoridae. 

 Figs. 1-17 — Eicdo.xia — Diphycs — AtJiorybia — Physalia — Velella — 



Steplianoniia . . . -124 



Plate 14. Lacinularia Socialis. A Contribution to the Anatomy 

 AND Physiology of the Rotifera. 

 Figs. 1-19 — Lacinularia socialis . . • ■ I44 • 



Plate 15. Lacinularia Socialis. A Contribution to the Anatomy 

 AND Physiology of the Rotifera. 

 Figs. 20-37 — Lacinularia socialis — Melicerta 7-ingens — Brachionis polya- 



canihus — Philodina, sp. (?) . . . 144 



Pl.ate 16. Lacinularia Socialis. A Contribution to the Anatomy 



AND Physiology of the Rotifera. 

 The diagrams illustrate Mr. Huxley's paper on Adult Rotifera, and on 



Larval Annelids and Echinoderms . 144 



Plate 17. On the Morphology of the Cephalous Mollusca, as 



ILLUSTR.ATED BY THE AnATOMY OF CERTAIN HETEROPODA AND 

 PTEROPOD.A COLLECTED DURING THE VOYAGE OF H.M.S. " RATTLE- 

 SNAKE," 1846-50. 

 Figs. 1-8 — Firol aides Desmareslii 192 



Plate 18. On the Morphology of the Cephalous Mollusca, as 

 illustrated by the anatomy of certain heteropoda and 



PtEROPODA COLLECTED DURING THE VOYAGE OF H.M.S. "RATTLE- 

 SNAKE," 1846-50. 

 Figs. 1-6 — Atlanta Lesuerii . . . 192 



Plate 19. On the Morphology of the Cephalous Mollusca, as 

 illustrated by the anatomy of certain heteropoda and 



PTEROPODA COLLECTED DURING THE VOYAGE OF H.M.S. "RATTLE- 

 SNAKE," 1846-50. 

 Figs. 1-7 — Pneumodermon—Eicribia Gaudiehaudii — Cleodora curvata — 



Cleodora aciculata 192 



Plate 20. On the Morphology of the Cephalous Mollusca, as 

 illustrated by the anatomy of certain heteropoda and 

 pteropoda collected during the voyage of h.m.s. "rattle- 

 SNAKE," 1846-50. 

 Figs. 1-17 — Aplysia — Atlanta — Patella — Pteroceras 192 



Plate 21. On the Anatomy and Development of Echinococcus 

 Veterinorum. 

 Figs. 1-5 .... . , 215 



Plate 22. On the Anatomy and Development of Echinococcus 

 Veterinorum. 



Figs. 6-9, a — E — Development of Echinococcus. . .215 



