UMBILICAL CORD OF THE PIG 17 



LITERATURE CITED 



1 Danchakoff, Vera 1918 Cell potentialities and differential factors con- 



sidered in relation to erythropoiesis. Am. Jour. Anat., vol. 24, p. 1. 



2 1918 Equivalence of different hematopoietic anlages (by method of stimu- 



lation of their stem-cells). II. Grafts of adult spleen on the allantois 

 and response of the allantoic tissues. Am. Jour. Anat., vol. 24, p. 127. 



3 Fuchs, H. 1903 Uber die sogcnannte "intracellulare" Entstehung der 



roten Blutkorperchen junger und erwachsener Sauger. Anat. Hefte, 

 Bd. 22, S. 95. 



4 Huntington, G. S. 1914 The development of the mammalian jugular 



lymph sac, of the tributary primitive ulnar lymphatic and of the 

 thoracic ducts from the viewpoint of recent investigations of verte- 

 brate lymphatic ontogeny, together with a consideration of the 

 genetic relations of lymphatic and hemal vascular channels in embryos 

 of Amniotes. Am. Jour. Anat., vol. 16, p. 259. 



5 Jordan, H. E. 1916 The microscopic structure of the yolk-sac of the pig 



embryo, with special reference to the origin of the erythrocytes. Am. 

 Jour. Anat., vol. 19, p. 277. 



6 1917 Hemopoiesis in the mongoose embryo, with special reference to the 



activity of the endothelium, including that of the yolk-sac. Pub. 251 

 of the Carnegie Institution of Washington, p. 291. 



7 1918 A contribution to the problems concerning the origin, structure, 



genetic relationship and function of the giant-cells of hemopoietic and 

 osteolytic foci. Am. Jour. Anat., vol. 24, p. 225. 



8 Ranvier, L. A. 1874 De dcveloppement et de 1'accroisement des vaisseaux 



sanguins. Arch, de Physiol., T. 6, p. 429. 



9 Sarin, F. R. 1917 Preliminary note on the differentiation of angioblasts 



and the method by which they produce blood-vessels, blood plasma 

 and red blood cells as seen in the living chick. Anat. Rec, vol. 13, 

 p. 199. 



10 Schaefer, E. A. 1S74 The intracellular development of blood corpuscles 



in mammals. Mon. Micr. Jour., vol. 11, p. 261. 



11 Schulte, H. vox W. 1914 Early stages of vasculogenesis in the cat (Felis 



domestica) with special reference to the mesenchymal origin of endo- 

 thelium. Memoir, Wistar Inst. Anat. and Biol., no. 3, pp. 1-92. 



12 Spuler, A. 1S92 Uber die "intracellulare" Entstehung roter Blutkor- 



perchen. Arch. f. mikr. Anat., Bd. 40, S. 530. 



