PUI^ATION OF TURTI^E'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 (1 1 to 14 days old) placed in 0.7 per cent NaCl. 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. 



