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dula thyreoidea nnd (Uandnla carotica. Z/-//c/// 1881. 

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u. l-'hysiol. Anat, Abth. 1886. 

 Toldt und Zuckerkandl. Ueber die Form- nnd Texturverandernngen der 



menschlichen Leber wahrend des Wachsthums. Sitzungsb. d. k. Akad. d. 



Wissensch. Wien, math.-naturw. Cl. Bd. LXXII. Abth. 3, Jahrg. 1875, 



p. 241. 1876. 



Toldt, C. Ban- und Wachsthumsveranderungen der Gekrose des inenschl. 



Darrncanales. Deukschr. d. k. Akad. d. Wissensch. Wien, rnath.-naturw. 



Cl. Bd. XLI. Abth. 2, 1879, pp. 1-56. 

 Toldt, C. Die Entwicklung und Ausbildung der Driisen des Magens. 



Sitzungsb. d. k. Akad. d. Wissensch. Wien, math.-naturw. Cl. Bd. LXXXII. 



Abth. 3, Jahrg. 1880, p. 57. 1881. 

 Toldt, C. Die Darmgekrose u. Xetze. Denkschr. d. k. Akad. d. Wissensch. 



Wien, math.-naturw. Cl. Bd. LVI. Abth. 1, pp. 1-46. 1889. 

 Tomes, Charles. Manual of Dental Anatomy, Human and Comparative. 



London 1882. German translation by Hollander. Berlin 1877. 

 Uskow, !N". Bemerkungen zur Entwickhmgsgeschichte der Leber n. der 



Lungen. Archiv f. mikr. Anat, Bd. XXII. 1883. 

 Waldeyer. Ban und Entwicklung der Ziihne. Strieker's Hand ouch der 



Lehre von den Geweben. Li'ij>:iij 1871. English translation. New York 



1872. 



Waldeyer. Untersuchungen liber die Entwicklung der Ziihne. Danzig 1864. 

 Wolfler, Anton. Uebcr die Entwicklung und den Ban der Schilddrase. 



Pn'i'Ull 1880. 



Wolff, Caspar Friedr. 1'eber die Bildnng des Diirmcanals im bebriiteteia 

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CHAPTER XV. 



THE ORGANS OF THE MIDDLE GERM-LAYER. 

 VOLUNTAEY MUSCULATURE, URINARY AND SEXUAL ORGANS. 



THE organs which take their origin from the middle germ-layer 

 stand in the closest genetic relation to the morphological products of 

 the entoblast. For, as was stated in the first part of this work, the 

 middle germ-layer is developed by a process of evagination from the 

 inner germ-layer, and is therefore, like the latter, an epithelial mem- 

 brane, which serves as the boundary of a cavity. In view of its 

 origin, is it remarkable that the organs arising from it are of a 

 glandular nature, and such as produce excretions by means of genuine 

 epithelial glandular cells 1 



In earlier times; this phenomenon ^was the cause of a good deal 



