LITERATURE. 



Ahlborn, F., 1884. Ueber die Segmentation des Wirbel- 

 tierkorpers. 

 Zeitschr wiss. Zool., Bd 40. 

 Alcock, R., 1898. The peripheral Distribution of the Cra- 

 nial Nerves of Ammocoetes. 

 Journ. Anat. Phys., Vol. 33. 

 •Allman, J., 1853. On the anatomy and physiology of Cordy- 

 lophora. 

 Philos. Trans. R. Soc. London. Vol. 143. 

 ANDREWS, E. A., 1891. On the eyes of Polychaetae. 

 Zool. Anz., Bd. 14. 



1892 On the Eyes of Polychaetous Annelids. 



Journ. Morph., Vol. 7. 

 ASSHETON, R., 1894. On the Growth in Length of the 

 Frog Embryo. 



Quart, lourn. Micr. Sc, Vol. 37. 



1 905. On Growth Centres in Vertebrate Embryos. 



Anat. Anz., Bd. 27. 



1909. Professor HUBRECHrs Paper on the Early 



Ontogenetic Phenomena in Mammals. 

 Quart. Journ. Micr. Sc, Vol. 54. 

 Ayers, H., 1890. Concerning Vertebrate Cephalogenesis. 



Journ. Morph. Boston, Vol. 4. 

 Baer, C. E. von, 1828. Entwickelungsgeschichte derTiere. 



Beobachtung und Reflection. 

 Balfour, F M., 1875. A comparison of the early stages 

 in the development in Vertebrates. 

 Quart. Journ. Micr. Sc, Vol. 16. 

 1876. On the Origin and History of the Uroge- 

 nital Organs of Vertebrates. 

 Journ. Anat. Phys., Vol. 10. 



1878. A monograph on the Development of 



Elasmobranch Fishes. 



1881. A Treatise on Comparative Embryology. 



BATESON, W., 1886. The Ancestry of the Chordata 

 Quart. Journ. Micr. Sc (2), Vol. 26. 



