LIST OF THE PLATES. 



PLATE 



Portrait of Mr. Albany Hancock, from a photo- 

 graph taken by Sir Joseph W. Swan, F.R.S., 

 and reproduced by his permission Frontispiece 



XXI. Figs. 15. dona intestinalis. Figs. 6-8. C. 



pulchella. Fig. 9. Gorella parallelogramma. 

 XXII. Figs. 1-8. Ciona fascicularis. Fig. 9. Gorella 

 larvaeformis. Figs. 10, 11. C. ovata. 



XXIII. Molgula conchilega : details. 



XXIV. Figs. 1-6. Molgula complanata. Figs. 7-10.- 

 M. oculata. 



XXV. Fig. 1. Molgula vah-ata. Figs. 2, 3. M. sim- 

 plex. Figs. 4-6. M. siphonata. 



XXVI. Figs. 1-4. Molgula siplionata. Figs. 5-9.- 

 M. citrina. Figs. 1012. Eugyra arenosa. 



XXVII. Figs. 1, 2. Molgula socialis. Figs. 3-5. M. 

 inconspicua. Figs. 6-8. M. citrina. 



XXVIII. Figs. 1, 2, Molgula socialis. Figs. 3-5. If. 

 citrina. 



XXIX. Figs. 1, 2. Eugyra arenosa. Figs. 5-7. E. 

 globosa. 



XXX. Figs. 1, 2. Cynthia claudicans. Fig. 3. C. 

 squamulosa. Figs. 4, 5. C. ovata. Figs. 6, 

 7. C. morns. Figs. 8, 9. C. tessellata. Fig. 

 10. C. echinata. 



XXXI. Figs. 1, 2. Cynthia rosea. Figs. 3-5. C. claudi- 

 cans. Figs. 6-8. C. squamidosa. 



XXXII. Figs. 1, 2. Cynthia squamulosa. Figs. 3-5. 

 C. ovata. Figs. 6, 7. G. tessellata. Fig. 8. 

 C. echinata. 



XXXIII. Fig. 1. Cynthia ovata. Figs. 2-5. C. morus. 

 Figs. 6, 7. C. tessellata. 



XXXIV. Figs. 1-5. Styela tuberosa. Fig-. 6. 8. in- 

 formis. Figs. 7, 8. S. 'mamillaris. 



XXXV. Fig. 1. Styela tuberosa. Fig. 2. S. mamillaris. 



