DER CHEMISCHE SINN DER NUDIBRANCHIER 



1375 



other expériences and prove a first rôle of thèse organs combinée! with the mouth- 

 region in chemoreception. This resuit must not be generalized: in Trinchesia 

 granosa, rhinophores as well as labial tentacles have a secondary rôle in chemo- 

 reception. 



Histological examination shows two types of receptors: free ner\e-endings, 

 probably responsible for tactile sensations and brush-cells supposed to transmit 

 Chemical stimuli. 



LITERATURVERZEICHNIS 



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