PUPATION OF TURTLE'S HEART. 

 PULSATIONS PER MINUTE 



59 



Fig. 36.-Showing the decline in rate and also the length of time that pulsation lasted in the 

 hearts of 10 loggerhead turtle embryos (11 to 14 days old) placed in 0.7 per cent Nad The 

 heavy line shows the average condition, and the fine unbroken lines show behavior of individual 

 embryos numbered from 1 to 10. The dotted lines cover periods from the last observation to 

 the time when the heart ceased to beat. 



