atjthor's abstract of this paper issued 

 bt the bibliographic service, october 23 



MUTUAL RELATIONSHIP IN THE DEVELOPMENT OF 

 THE BRAIN AND EYES OF LEPIDOPTERA^ 



STEFAN KOPEC 

 Government Institute for Agricultural Research, Pulawy, Poland 



ONE PLATE (six FIGTJRES) 



THE DEVELOPMENT OF IMAGINAL EYES IN BRAINLESS INSECTS 



The correlation of the components of the eye in the ontogenetic 

 development of vertebrates has been studied. The experiments 

 undertaken by Spemann on the development of the lens and 

 by Lewis on the development of the cornea and continued by 

 Bell, Le Cron, Durken, Ekmann, Fischel, King, Wachs, and 

 others proved that while in certain amphibians the lens depends 

 on the optic cup and the cornea on tjie lens, in others such a 

 dependence cannot be ascertained. The mutual relationship 

 between the development of the nervous system and the onto- 

 genetic formation of the eyes in invertebrates has, so far as I 

 know, not yet been studied. The investigations of Herbst on 

 Crustacea ('96-'16), Carriere ('80) and Hank6 ('14) on the Mol- 

 lusca, since they refer only to the processes of regeneration of the 

 eyes, do not come into consideration here. In my experiments 

 on insects I endeavored to study these relations by examining 

 the development of the eye in moths the caterpillars of which 

 had been deprived of the brain, and the development of the 

 imaginal brain in animals whose caterpillars had been deprived 

 of the eyes. 



I removed the whole brain (ganglion supraoesophageale) from 

 several caterpillars of Lymantria dispar L after their last moult. 



1 Paper from the Embryologic-Biological Laboratory, Jagellonian University, 

 Cracow, Poland, presented in the Acad, of Sc, Cracow (cf. Bull, intern. Acad. d. 

 Sc.Cracovie, 1917). 



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