JOURN.R.IVllCR.SOC.1913,Pl.XXl, 



Fig. 1. — Nuclei : Interstitial tissue. 

 Testis of Triton. 





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■% 



7N^ 





V-", 



^•^Ife. 



r 



Fig. 2. — Interstitial tissue. 

 Testis of Salamander. 









Fig. 3. — Allium : Growing root-tip. 

 Longitudinal section. 



Fig. 5. — Fritillaria : Growing root-tip. 

 Longitudinal section. 



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mmi 







^ 

 •^ 





Fig. 4. — Allium : Growing root-tip. 

 Longitudinal section. 





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Fig. 6. — Fritillaria : Growing root-tip. 

 Longitudinal section. 



