146 VARIATION IN THE NUMBER OF STRIPES ON SAGARTIA LUCI^E. 



Fig. 9. Diagram illustrating a case of observed asymmetrical arrangement of mesenteries and stripes. The heavy 



lines represent the stripes and the dotted ones the mesenteries. 

 Fig. 10. Diagram illustrating asymmetry of stripes and mesenteries. The long lines represent the stripes and the 



short lines the mesenteries. 

 Fig. 11. Diagram illustrating a case in which three of the stripes (represented in heavy lines) came with the 



divided piece, while the other stripes (fainter and nearer together) were the product of regeneration. 

 Fig. 12. Diagram of a specimen with only one stripe present and that one handed down with the old piece of 



tissue; none have as yet developed in the regenerated part. 



Fig. 13. Diagram of a specimen with six stripes from the old tissue; none developed in the new. 

 Fig. 14. Diagram of a specimen with two stripes from the old tissue; six regenerated in the new. 

 Fig. 15. Curve illustrating the distribution of the number of stripes in 751 individuals. to 20 are the abscissae; 



to 112 the ordinates. 



