APPENDIX 653 



10. J. LEIDY. Fresh-water Rhizopoda of North America, 1879. 



11. E. HAECKEL. Die Radiolarien, 1862. 



12. W. SAVILLE KENT. Manual of the Infusoria, 3 vols., 1880-81. 



13. E. HAECKEL. Die Kalkschwamme, 3 vols., 1872. 



14. W. HUDSON and P. H. GOSSE. The Rotifera, 1889. 



III. In making a serious study of Zoology it is essential to have at 

 hand advanced text-books which can be consulted in cases of difficulty, 

 and which give references to the literature of the science, so that the 

 original sources of information can be readily found. The following 

 are the most generally useful to the English student. 



1. G. ROLLESTON and W. HATCHETT JACKSON. Forms of Animal 



Life, 1888. 



2. C. GLAUS. Text-book of Zoology, 2nd English edition, 1890. 



[Specially useful for finding the zoological positions of unknown 

 animals : brief diagnoses of the groups are given down to 

 families, and the principal genera are named.] 



3. E. RAY LANKESTER and others. Zoological articles contributed 



to the Encyclopedia Britannica, 9th edition, 1891. [Protozoa, 

 Sponges, Hydrozoa, Planarians, Nemertines, Rotifera, Mollusca. 

 Polyzoa, Yertebrata, Tunicata.] 



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



Edition, 1878. 



5. A. LANG. Text-book of Comparative Anatomy, Part I. (Protozoa 



to Arthropoda), 1891 : Part II. (Mollusca, Echinodermata 

 and Enteropneusta), 1896. 



6. R. WIEDERSHEIM. Elements of 'the Comparative Anatomy of Verte- 



brates, 2nd English edition, adapted by W. N. Parker, 1897. 



7. SIR R. OWEN. Anatomy and Physiology of Vertebrates, 3 vols., 



1868. 



8. T. H. HUXLEY. The Anatomy of Vertebrated Animals, 1871 : 



The Anatomy of Invertebrated Animals, 1877. 



9. A. GUNTHER. The Study of Fishes, 1880. 



10. BASHFORD DEAN. Fishes, Living and Fossil, 1895. 



11. A. WILLEY. Amphioxus and the Ancestry of the Vertebrates, 



1894. 



12. A. NEWTON. A Dictionary of Birds, 1893-96. 



13. SIR W. H. FLOWER. Osteology of the Mammalia, 1885. 



1 4. SIR W. H. FLOWER and R. LYDEKKER. Mammals, Living and 



Extinct, 1891. 



15. The Cambridge Natural History, vol. II. (Worms, Rotifers, and 



Polyzoa), 1896, vol. III. (Mollusca and Brachiopoda), 1895, 

 and vol. V. (Peripatus, Myriapoda, and part of Insecta), 1895, 

 already published. 



In addition to the above the following is indispensable for full 

 information. 



