654 ZOOLOGY 



16. BRONN'S Klassenund Ordnungen des Thierreichs. 1859 onwards. 

 The numerous volumes, by various authors, are of very unequal 

 value, some being out of date, others quite recent, others still in 

 progress. The most important are Biitschli's Protozoa, Vos- 

 maer's Porifera, Chun's Ccdenterata, Braun's Vermes, Ludwig's 

 Echinodermata, Gerstaecker's Crustacea, Simroth's Mollusca, 

 Hoffmann's Reptilia, and Selenka and Gadow's Aves. 



IV. For special departments of Zoology the following works are 

 recommended. 



a. Embryology. 



1 . KORSCHELT and HEIDER. Text-book of the Embryology of Inver- 



tebrates. English Edition, 2 vols., 1895-7. 



2. F. M. BALFOUR. A Treatise on Comparative Embryology, 2 vols., 



1880-81. 



b. Palceontology. 



1. H. ALLEYNE NICHOLSON and R. LYDEKKER. Manual of Palaeon- 



tology, 2 vols., 1889. 



2. K. A. VON ZITTEL. Traite de Paleontologie, 2 vols., 1887, 1893. 



c. Distribution. 



1. A. R. WALLACE. Geographical Distribution of Animals, 2 vols., 



1876; Island Life, 1880. 



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



3. F. E. BEDDARD. Text-book oj Zoo-geography, 1895. 



4. R. LYDEKKER. Geographical History of Mammals, 1896. 



c. Philosophy of Zoology. 



1. C. DARWIN. Origin of Species, 6th edition, 1880 ; Descent of 



Man, 1882; Animals and Plants under Domestication, 2 vols., 

 1888. 



2. G. J. ROMANES. Darwin and after Darwin, 2 vols., 1892 and 



1895. 



3. A. R. WALLACE, Darwinism, 1889; An Examination of Weis- 



mannism, 1893. 



4. C. LLOYD MORGAN. Animal Life and Intelligence, 1894 : Habit 



and Instinct, 1897. 



5. A. WEISMANN. Essays upon Heredity, 1889 and 1892 ; The Germ- 



Plasm, 1893. 



6. E. B. POULTON. Colours of Animals, 1890: Charles Darwin 



and the Theory of Natural Selection, 1896. 



7. F. E. BEDDARD. Animal Coloration, 1892. 



8. O. HERTWIG. The Biological Problem of To-day, 1896. 



d. History of Zoology. 



1. V. CARUS. Geschichte der Zoologie, 1872 (French translation, 

 Histoire de la Zoologie, 1880). 



