LARVAE OF ARBACIA PUNCTULATA 



341 



TABLE 5 

 Constants, Experiment 1. Solution e 



24 hours 



[Right anal. 

 Left anal. . 



i Right oral. 

 [Left oral. . 



48 hours < 



72 hours 



Right anal. 

 Left anal. . 

 Right oral. 

 Left oral. . . 



Right anal. 

 Left anal. . 

 Right oral. 

 Left oral. . . 



■ 2.35 

 2.35 

 2.51 

 2.51 



35.98 

 36.03 

 29.29 

 26.36 



46.37 

 46,38 

 35.91 

 33.95 



0.13 

 0.13 

 0.13 

 0.13 



0.30 

 31 

 0.25 

 0.24 



0.21 

 0.21 

 0.18 

 0.18 



STANDARD 

 DEVIATION 



1.98 

 1.98 

 2.04 

 2.04 



4.55 

 4.60 

 3.71 

 3.65 



3.23 

 3.19 



2.77 

 2.77 



0.09 

 0.09 

 0.09 

 0.09 



0.21 

 0.21 

 0.17 

 0.17 



0.15 

 0.15 

 0.13 

 0.13 



COEFFICIENT OF 

 VARIATION 



84.54 

 84.54 

 81.35 

 81.35 



12.65 

 12.79 

 12.69 

 12.43 



6.98 

 6.89 

 7.71 

 7.73 



6.28 

 6.28 

 5.91 

 5.91 



0.61 

 0.61 

 0.61 

 0.60 



0.33 

 0.33 

 0.37 

 0.37 



Fig. 21 la, 120 hrs. Control. 



Fig. 22 16, 120 hrs. Specimen normal in all respects except size, which is 

 increased above that of control. 



JOURNAL OF .MORPHOLOGY, VOL. 30, NO. 1 



