318 



W. J. CROZIER 



TABLE 4 



Relation of pulsation rate in the excised cloacae to the size of the animals from which 

 they ivere obtained. Temperature = 26.0° 



17 



Fig. 16 Reaction of the opening sphincter to tactile stimulation at the point 

 For explanation, see text. 



Fig. 17 

 Fig. 18 



For explanation, see text. 



