No. 485] THE FUNCTIONS OF THE sriUACI.E 299 



Later in tlic (>x|.erinu'i 

 high, with IV('(|ii('nt s\)> 

 At the near a])i)n)ac 

 ually diminishes, l)Ui 

 frequency than under i 



slow, but during the ( 

 spouting oeeurred with 

 in one minute. Wilhi 



gradually fell, as the nite 



with much greater fre(ni(Mic 

 Spouting Induced hii 7V. 

 vations led me to trv'tlie t 

 in the vici.n-ty of t'hr cm 

 margin of the spiniclc \\;i> 

 rod or with a stiir hit of 

 diately a spouting from 1.. 

 stimulation, or persistent iii 

 in a vigorous spouting fron 

 had once been provoked 

 repetition of the stiiniil.itid 

 spouting. But after an iin 

 renewed stimulation nsiiall\ 

 One skate was especiall; 

 much more prom])tly aixi 

 animal was exjjerinicnied \ 



only. Thisone-sided.p<.ntnii:ua>i» 

 and then from the other, in fairl_\ ra|. 

 stimulation of the spiracles aherna 



