390 BRADLEY M. PATTEN 
Miuuer, ApAM M., anp McWuorter, J. E. 1914 Experiments on the develop- 
ment of blood vessels in the area pellucida and embryonic body of the 
chick. Anat. Rec., vol. 8, pp. 203-227. 
Murray, Henry A., Jr. 1919 The development of the cardiac loop in the rab- 
bit, with especial reference to the bulboventricular groove and origin 
of the interventricular septum. Am. Jour. Anat., vol. 26, pp. 29-39. 
Rast, C. 1887 Ueber die Bildung des Herzens der Amphibien. Morph. Jahr- 
buch, Bd. 12, 8. 252-274. 
ReaGcen, F. P. 1915 Vascularization phenomena in fragments of embryonic 
bodies completely isolated from yolk-sac blastoderm. Anat. Rec., 
vol. 9, pp. 329-341. 
1917 Experimental studies on the origin of vascular endothe- 
lium and of erythrocytes. Am. Jour. Anat., vol. 21, pp. 39-175. 
Ropertson, JANE I. 1913 The development of the heart and vascular system 
of Lepidosiren paradoxa. Quart. Jour. Mic. Sci., vol. 59, pp. 53-182. 
RitcKert, J., unD MoutuieR, 8. 1906 Die erste Entstehung der Gefiisse und des 
Blutes bei Wirbelthieren. Handbuch der Vergl. u. exp. Entw., Hert- 
wig Baal dela iweane Vi. 
Sapin, F.R. 1917 Origin and development of the primitive vessels of the chick 
and of the pig. Carnegie Institution, Contributions to Embryology, 
no. 18, vol. 6, pp. 61-124. 
Scouts, H.W. 1916 The fusion of the cardiac anlages and the formation of 
the cardiac loop in the cat. Am. Jour. Anat., vol. 20, pp. 45-72. 
Tonar, M. 1869 On the development of the semilunar valves of the aorta and 
pulmonary artery of the chick. Phil. Trans. Roy. Soc., London, vol. 
159, Pt. J, pp. 387-411. 
Yosutnaca, T. 1921 A contribution to the early development of the heart in 
mammalia, with special reference to the guinea-pig. Anat. Rec., vol. 
21, pp. 239-308. 
