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THE AMEBIC AN NATURALIST [Vol.L 



ber of red spots found on any single animal. Only one animal in 

 each of these last five groups was found. 



Figs. 21 to 24, as noted above, represent animals obtained from 

 Woods Hole; they have 11, 16, 19 and 20 spots, respectively, and 

 it will be noted that all of the spots are small and of fairly uni- 



CONCLUSION 



It would seem from this hurried survey that the number, size 

 and arrangement of the vermilion spots, so characteristic of D. 

 viridescens, are quite variable, probably two animals very seldom 

 being even approximately alike. 



Albert M. Reese 



West Virginia University, 



MORGANTOWN 



