78 



ALBERT KUNTZ 



sy ty-% 



mes 



Fig. 1 Transverse section through the anterior region of the adrenal zone in 

 an eight-day embryo of Thalassochelys caretta. X 150. ad, adrenal buds; ao, 

 aorta; m, raesonephros; mes, mesentery; sy, anlagen of sympathetic trunks. 



Fig. 2 Transverse section through the middle region of the adrenal zone in an 

 eight-day embryo of Thalassochelys caretta. X 150. ad, adrenal buds; ao, 

 aorta; m, mesonephros; mes, mesentery; sy, anlagen of sympathetic trunks. 



Fig. 3 Transverse section through the middle region of the adrenal zone in 

 a nine-day embryo of Thalassochelys caretta. X 150. ad, adrenal buds; ao, aorta; 

 m, mesentery; sy, anlage of sympathetic trunk. 



Fig. 4 Transverse section through the adrenal zone in an eleven-day embryo- 

 of Thalassochelys caretta. X 150. ad, adrenal anlagen; ao, aorta ;mes, mesen- 

 tery; sy, anlagen of sympathetic trunks; syc, sympathetic cells. 



