ALIMENTAEY CANAL IN LEPIDOSIEEN AND PEOTOPTEEUS. 485 
Text-fig. 1 a. 
Text-fig. 1 b. 
Text-figs. 1 a, b. — Sagittal sections illustrating the folding off of 
the fore-gut. a. Protopterus, stage XXIII. b. Lepido- 
siren, stage XXV. br. Brain, f.g. Fore-gut. 
