THE VI'SILOID APPARATUS OF URODELES. 



277 



shows. Moreover, the expulsion of water takes place through 

 the slightly opened mouth as well as through the nares. Ambly- 

 stoina opacnin, which is said to be the most terrestrial of all the 

 Amblystomas, showed the least readiness to adopt this aquatic 

 mode of respiration, the pharyngeal movements being very feeble 

 as if they occurred in response to an almost forgotten instinct. 

 They are probably not of sufficient respiratory value to support 

 life, since these specimens die in a short time if compelled to re- 

 main in the water. 



RECORD OF OBSERVATIONS OF AQUATIC BUCCO-PHARYNGEAL 

 RESPIRATION IN DIEMYCTYLUS VIRIDESCENS. 



(In each experiment a different individual was used.) 



RECORD OF OBSERVATIONS OF AERIAL BUCCO-PHARYNGEAL AND 

 PULMONARY RESPIRATION IN DIEMYCTYLUS VIRIDESCENS. 



