DIGESTIVE AND RESPIRATORY SYSTEM 287 



a / b c 



FIG. 79. Embryonal anlagen of the glands associated with the pharynx 

 and pharyngeal pockets, [a-d, after MAURER; e-h, after VERDUN.] 



. Thymus anlagen are indicated by dots, thyreoid by diagonal lines, epithelial cor- 

 puscles by radiating lines, and post-branchial (supra-pericardial) bodies in black. The 

 pharyngeal pockets are designated by Roman numerals. 



(a) Cyclostome. (b) Teleost. (c) Urodele. (d) Lizard (Lacerta). (e) Chick, 

 (f) Cat. (g) Man. (h) Mole. 



