72 COMPARATIVE AXATOMY. 



d. Comparative Histology : 



Letdig, F., Lehrbucli tier Histologic des Mcnschen unci der Thiere. Frankfort, 1857. 



e. Ontogeny : 



Foster, M., and Balfour, T. M., The Elements of Embryology. Fart I. Macmillan and Co. London, 



1874. 

 KoLtiKER, A., Entwickelungsgeschichte des Mensclien u. der hoheren Thiere. 2« Auflage. 1 Hulfte. 



Leipzig, 1876. 



In addition to these works, numerous monographs, treatises and essays, 

 contained in the transactions of academies, and other learned societies, or 

 Journals of Natural History, Zoology, and Anatomy, should be consulted. 



[The English student should consult especially the " Journal of Anatomy " 

 (Macmillan), dating from 1867, and the " Quarterly Journal of Microscopical 

 Science " (Churchill), dating from 1853— E. R. L.] 



