694 APPENDIX 



18. DELAGE, Y. L'Heredite et les grandes problemes de Biologie 



gdnerale, 2nd edition, 1903. 



19. DELAGE, Y. et HEROUARD, E. Traite de Zoologie Concrete. 



I. La Cellule et les Protozoaires, 1896. II. Spongiaires et 

 Coelenteres, 1899. III. Echinodermes, 1903. Y. Vermidiens, 

 1897. VII. Prochordts, 1898. 



20. DUVAL, M. Atlas d Embryologie, 1889. 



21. EIMER, T. Die Entstehung der Arten, 1888. English Trans- 



lation, Organic Evolution, 1889. 



22. FLOWER, W. H. Osteology of the Mammalia, 1885. 



23. FLOWER, W. H., and LYDEKKER, R. Mammals, Living and 



Extinct, 1891. 



24. GAUDRY, J. Les enchainements du monde animal dans les temps 



geologiques, 1878. 



25. GEGENBAUR, C. Elements of Comparative Anatomy. English 



Translation, 1878. 



26. GEGENBAUR, C. Vergleichende Anatomie der Wirbelthiere, 2 vols., 



1898 and 1901. 



27. HATSCHEK, B. Lehrbuch der Zoologie. 



28. HEILPRIN, A. The Distribution of Animals, 1887. 



29. HERTWIG, O. Lehrbuch der Entwickelungsgeschichte der Wirbel- 



thiere, 8th edition, 1906. English Translation of 3rd German 

 edition, 1892. 



30. HERTWIG, O. Handbuch der vergleichenden und experimentellen 



Entwickelungslehre der Wirbelthiere. Sections by various 

 writers, 3 vols., 1901-1906. 



31. HERWIG, O. The Biological Problem of To-day, 1896. 



32. HERTWIG, O. Allgemeine Biologie, 3rd edition, 1909. 



33. HERTWIG, R. Lehrbuch der Zoologie. 9th edition, 1910. 



English Translation of 3rd edition. 



34. HUXLEY, T. H. The Anatomy of Invertebrated Animals, 1877. 



35. HUXLEY, T. H. The Anatomy of Vertebrated Animals, 1871. 



36. JORDAN, D. S., and KELLOGG, V. L. Evolution and Animal Life, 



1907. 



37. KEIBEL, F. Normentafeln zur Entwickelungsgeschichte der 



Wirbeltiere. [Pig, Fowl, Ceratodus, Li/ard, Rabbit, Deer, 

 Tarsius, Nycticebus, Man, Lapwing.] 1897-1909. 



38. KELLOGG, V. L. Darwinism To-day, 1907. 



39. KINGSLEY, J. S. Text-book of Vertebrate Zoology, 1899. 



40. KORSCHELT, E., and HEIDER, K. Text-book of the Embryology 



of Invertebrates. English edition, 4 vols., 1895. 



41. LANG, A. Lehrbuch der vergleichenden Anatomie der wirbellosen 



Thiere, 1894; English Translation, Comparative Anatomy 

 of Invertebrates, 1891-6. Second German edition, Protozoa, 

 1901, Mollusca, 1900. 



42. LANKESTER, E. R. A Treatise on Zoology. I. Protozoa (LISTER, 



MINCHIN, HICKSON). II. Porifera and Ccdentera (MiNCHiN, 



