WOLFFIAN TUBULES IN MAMMALIAN EMBRYOS 435 



LITERATURE CITED 



Bremer, J. L. 1911 Morphology of the tubules of the human testis and epididy- 

 mis. Am. Jour. Anat., vol. 11, p. 404. 

 Felix, W. 1912 The mesonephros. Human embryology, edited by Keibel and 



Mall, vol. 2, p. 807. 

 Gadow, H. 1891 Vogel. Bronn's Klassen und Ordnungen des Thier-Reichs. 



Bd. 6, Abth. 4, Th. 1, S. 829. 

 Kolliker, A. 1879 Entwicklungsgeschichte des Menschen. Zweite Auflage, 



S. 944. 

 Kollmann, J. 1898 Lehrbuch der Entwickelungsgeschichte des Menschen, 



S. 398-399. 

 Lineback, P. E. 1916 The development of the spiral coil in the large intestine 



of the pig. Am. Jour. Anat. , vol. 20, pp. 488-489. 

 MacCallum, J. B. 1902 Notes on the Wolffian body of higher mammals. Am. 



Jour. Anat., vol. 1, pp. 250-254. 

 Meyer, H. 1890 Die Entwickelung der Urnieren beim Menschen. Arch. f. 



mikr. Anat., Bd. 36, S. 161. 

 Mihalkovics, G. V. von 1885 Untersuchungen liber die Entwickelung des 



Harn- und Geschlechtsapparates der Amnioten. Internat. Monatschr. 



f. Anat. u. Physiol., Bd. 2, S. 76-79. 

 Minot, C. S. 1892 Human embryology, p. 239. 

 Nicolas, A. 1891 Contribution a l'etude des cellules glandulaires. I. Les 



elements des canalicules du rein primitif chez les mammiferes. Ex- 

 trait du Journ. internat. d'Anat. et de Physiol., T. 8, p. 94 (of the 



reprint) — "Conclusions." 

 Schreiner, K. E. 1902 tjber die Entwicklung der Amniotenniere. Zeitschr. 



f. wiss. Zool., Bd. 71, S. 96. 

 Thompson, D. W. 1917 On growth and form. Cambridge University Press. 

 Weber, S. 1897 Zur Entwicklungsgeschichte des uropoetischen Apparates bei 



Saugern. Morphol. Arbeiten. Bd. 70, S. 621. 

 Winiwarter, H. von 1910 La constitution et l'involution du corps de Wolff. 



Arch. de. Biol., T. 25, p. 184. 



ADDENDUM 



The foregoing account pertains only to mammals but it may be of interest 

 to compare the models of the Wolffian tubules in pig embryos with those of the 

 corresponding structures in adult amphibians. For this purpose two figures are 

 available, by Nussbaum and Huber respectively. Nussbaum (Arch. f. mikr. 

 Anat., 1886,' Bd. 27, Taf. 23, Fig. 28) shows a mesonephric tubule isolated by 

 maceration from the kidney of Rana esculenta. Any subdivision into C, U, V 

 and Z portions seems impossible. Huber (Anat. Rec, 1917, vol. 13, p. 310) pre- 

 sents a wax reconstruction of a tubule from Rana catesbiana, which has many 

 points of similarity' to Nussbaum's figure, and yet, notwithstanding many 

 secondary convolutions, may readily be resolved into the pattern in question. 

 Further study is needed to show whether this interpretation of the model is of 

 any real significance. 



