Das Schema der Wirbeltieraug-en. 



19 





fin 



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pq 





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 es os a p on i« 

 &x) &D ?r 05 a o a 



:o s5' 



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VT -^ S n ^ =" '■■-' 



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a a - S a 'S ?L 



g " a, a g S-S 



g i g 03 § 45 ^^ 



a 5 a a a<-2 " 

 a S a-^ =ä--S " 



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Ph 



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