1. "Manuel d'Actinologie et de Zoophytologie." De Blainville. 1834-37.

2. "Klassen und Ordnungen des Thier-Reichs," vol. ii. 'Strahlenthiere.'

Bronn. 1859-60.

3. "Manual of the Coelenterata." Greene. 1861.

4. "Essay towards a Natural History of Corallines." Ellis. 1775.

5. "Die Pflanzen-Thiere in Abbildungen." Esper. 1788-1830.

6. "Histoire des Animaux sans Vertebres," vol. ii. Lamarck. (Ed. 2, 1836.)

7. "History of British Zoophytes." Johnston. 1847.

8. "Manual of Marine Zoology for the British Isles." Gosse. 1855.

9. "Beitrage zur Kenntniss. Wirbelloser Thiere." Frey and Leuckart. 1847.

10. "Icones Histiologicae." Abth. ii. 'Die Binde - Substance der Coelenteraten.' Kolliker. 1866.

11. " Histoire Naturelle des Coralliaires ou Polypes proprement dits."

Milne-Edwards and Haime. 1855-60.

12. "Zoophytes." 'Report of Exploring Expedition under. Capt. Wilkes.'

Dana. 1848.

13. "On the Alternation of Generations." Steenstrup. (Eng. Trans, by Busk.) 1845.

14. "Contributions to the Natural History of the United States." (Acalephae, vols. iii and iv.) Louis Agassiz. 1860-62.

A. Hydrozoa

I. Hydrida.

15. " Memoires pour servir a. l'histoire d'un genre de Polypes d'eau douce, a bras en forme de cornes." Trembley. 1744.

16. " Hydra, ein anatomisch entwickelungs-geschichtliche Untersuchung." Kleinenberg. 1872. II. Corynida, Sertularida, And Campanularida.

17. "Monograph of the Gymnoblastic or Tubularian Hydroids." 'Ray Society.' Allman. 1871. (The first part of this work comprises an elaborate account of the Hydroida generally.)

18. " British Hydroid Zoophytes." Hincks. 1872.

19. " Recherches sur la Faune littorale de Belgique." (Polypes.) Van Beneden. 1866.

20. "Contributions to the Natural History of the United States." (Acalephae.) Louis Agassiz. 1860-62.

21. " North American Acalephae." 'Illust. Catalogue Mus. Comp. Zool.' No. 11. (Hydroida, pp. 64-198.) A. Agassiz. 1865.

22. "Report on the Hydroida of the Gulf-Stream." 'Memoirs of the Museum of Comparative Zoology at Harvard.' Allman. 1877. III. Oceanic Hydrozoa.

23. "Monograph of the Oceanic Hydrozoa." ' Ray Society.' (With a general introduction.) Huxley. 1859.

24. " Die Siphonophoren oder Schwimm-polypen von Messina." Kolliker.

1853

25. "Siphonophoren von Nizza." 'Zoologische Untersuchungen,' ii.

Leuckart. 1853.