392 



ON RESPIRATION, 



Fig. 93. 



Fig. 04. 



Lung of Triton cri&tatus, magnified about 3 dia- 

 meters ; a, pulmonary artery ; 6, pulmonary vein. 



Portion of the lung of the same animal, more 

 highly magnified ; the vessels, finely injected with 

 size and vermilion, form a network so minute that 

 the parenchyma is only seen in small islets in its 

 interstices. (After Wagner.) 



Fis. 95. 



Portion of the lung of a living Triton, as seen under the microscope wilh a power of 150 diameters: a, 

 pulmonary vein, receiving blood from the large trunk c, and a smaller vessel d. (After Wagner.) 



