CHROMOSOMES IN ECHINOID EGGS 



DAVID H. TENNENT 



PLATE 2 



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[ 



:^^v^ 



10 



<^ 



^1 



llA 



\ 



■^ W 1//' 





^/'l!#<"- 



IIB 







13B 



14A 



4' 



// V:\13A 



/ 





^'KM!^ 



14B 





/ \ 



>« 



\ 



/,'\\)^Y 





16 



A 





irA 



180 



<jlii 



ISA 





18B 







11'// 



17B 



ir//- 1 ■•■.', -., 





19 



20A 



'SOB 



29 



