2^6 



sides of the stem. He interprets this condition as indicating a 

 wandering of this median branch to the stem. As a matter of fact, 

 however, this is the normal relationship for the grown lung, and, as 

 I have pointed out above, the medial series do not occur higher than 

 Lateral 4. It is scarcely justifiable, therefore, to intrepret the suc- 

 cessive change in the insertion of this median branch, together with 

 the appearance of the medial buds in their usual position as evidence 

 of wandering on the part of the median bronchi. 



In reference to the further division of the tree after the principal 

 branches are laid down, Moser, Willach, Narath, Cadiat, Küttner 

 and KöLLiKER believe in a monopodial propagation, while His, Minot, 

 d'Hardiviller, Hesser and Flint believe in the dichotomous form 

 either equal, unequal, or both. 



Literature. 



Aeby, Der Bronchial bäum der Säugetiere und des Menschen, Leipzig 



1880. 

 Blisnianskaja, Die Entwickelungsgeschichte der menschlichen Lungen. 



Diss. Zürich 1904. 

 Cadiat, Journal de l'Anatomie et de la Physiologie, 1877. 

 d'Hakdiviller, Bibliographie anatomique, 1896, 1897; Comptes rendus 



de la Societe de Biologie, 1896, 1897. 

 EwART, The Bronchi and the Pulmonary Blood Vessels, London 1889. 

 Hesser, Anatomische Hefte, 1905. 

 His, Arch. f. Anat. u. Entwick., Anat. Abt., 1887. 

 Huntington, Annais of the New York Academy of Sciences, 1898. 

 JusTESEN, Arch. f. mikr. Anatomie, 1900. 



KöLLiKER, Entwickelungsgeschichte des Menschen, Leipzig 1879. 

 MiNOT, Human Embryology, New York 1892. 

 Moser, Arch. f. mikr. Anatomie, 1902. 

 Narath, Zoologische Forschungsreisen in Australien u. dem Mälayischen 



Archipel (Semon), Jena 1896; Bibliotheca medica, Anat. Abt., Heft 3, 



1901. 

 Nicholas and Dimitrova, Comptes rendus de la Societe de Biologie,- 



1897. 

 Robinson, Journal of Anatomy and Physiology, 1889. 

 Stieda, Zeitschr. f. wiss. Zoologie, Suppl.-Bd., 1878. 

 WiLLACH, Beiträge zur Entwickelung der Lunge bei Säugetieren, Oster- 



wieck a. Harz (Zickfeldt) 1888. 



