EMERGENCY RESPIRATION 



47 



In an Indian inhabitant of swamps Pseudapocryptes, Das 

 (1934) found the walls of the buccal, pharyngeal and branchial 

 cavities, especially the operculum (Fig. 20) richly vascularized, 

 but the surfaces present no special enlargements. When the 



Fig. 21. Diagram of accessory respiratory organs and their blood supply from 

 the branchial arteries in Gymnotus. (Carter.) 



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Fig. 22. Section through part of a respiratory papilla with vascularized 

 epithelium, 60 1. (Boker.) 



