672 Mutations 



Sarracenia and some otliers are very well 

 known and perhaps even the bladderworts or 

 Utricularia might be included here. 



The reproduction of specific characters by 

 anomalous ascidia is not at all limited to the 

 general case as described above. More minute 

 details may be seen to be duplicated in the same 

 way. Proofs are afforded on one side by in- 

 complete ascidia, and on the other by the double 

 cups. 



Incomplete ascidia are those of the Nepenthes. 

 The leaf is divided into three parts, a blade, a 

 tendril and the pitcher. Or in other words, the 

 limb produces a tendril at its summit, by means 

 of which the plant is enabled to fasten itself to 

 surrounding shrubs and to climb between their 

 branches. But the end of this tendril bears a 

 well-formed urn, which however, is produced 

 only after the revolving and grasping move- 

 ments of the tendril have been made. Some 

 species have more rounded and some more 

 elongated ascidia and often the shape is seen to 

 change with the development of the stem. The 

 mouth of the urn is strengthened by a thick rim 

 and covered with a lid. Numerous curious con- 

 trivances in these structures to catch ants and 

 other insects have been described, but as they 

 have no relation to our present discussion, we 

 shall abstain from dealing with them. 



