384 



WALTER E. CAMP 



sixth pouch and are located exactly in the place where one would 

 expect the anlage of the seventh pouch to appear. 



The suprapericardial bodies are attached to the medial wall 

 of the ventral outpouching of the pharynx. The right gland 

 is very small and is at about the level of the base of the left one. 



Fig. 5 Sagittal section through the pharynx of an embryo 60 mm. long (H. 

 E. C. 427). X 30. II to IV, second to fourth gill-pouches; Ph., pharynx; At. 

 atrium; Yt.. ventricle; C.c, ceratobranchial cartilage; L.s.b., left supraperi- 

 cardial body: M.rb., musculus coracobranchialis. 



