18 XV. V. Breindl u. J. Komárek: 



3. These »crystals« begin in the nuclei as quite ]ittle 

 points and grows, prol)bably by apposition, to a conside- 

 rable size. 



4. All the physičal and chemical properties of the poly- 

 hedral bodies are in direct contradition with all our concep- 

 tions of the living organism. 



5. They begin in cell-kernels and appear in the blood- 

 corpuscles only when phagocytized. 



6. Fig. 1 a. 2, PÍ. I and microfot. Fig. A demonstrate 

 that in every polyhedral bodv lodge many small, capsnlate 

 micrococcus-shaped organisms — Prowazek called them 

 Chlamydozoa. 



7. These coccus-like inclusions overfill the remaining 

 chromatin body in every polyhedral nucleus (Fig. 2, PÍ. I, r). 



8. They can be sometimes also found floating free in 

 the blood of sick caterpillars (Fig. 3, PÍ. T, ch). 



9. We injected very carefnlly cleaned polyhedral b. into 

 a healthy Caterpillar of Macrothyletia rub i. They 

 began slowly to dissolve and after 48 hours we found many 

 of the just meentioned »Chlamydozoa« phagocytized in the 

 blood- corpušcles (Fig. 4, PÍ. I, ch). 



10. The polyhedr. b. can be dissolved with the intest ine 

 chylus more quickly than in pure lymDhe. They change in 

 to a foamy substance, in which appear the »Chlamdozoa« 

 zoogleea-like accumulated together. 



It seems that the infection in nature enters into the 

 caterpillars body per os. 



11. The polyhedral-crystals begin in the kernel-cavity, 

 but probably from the chromatin-substance. The latter then 

 disappears gradually together with the growing up of the 

 polyhedral b. 



12. The virus of this disease lives in the chromatin and 

 <?auses the swelling up of the ke mel, analogous as the puffing 

 up of the blood-corpuscels in malaria or haemosporidiasis 

 etc. The only difference, however, is that in this čase is 

 attaked the nucleus instead of the cell protoplasma. 



13. How shall we explain the polyhedral bodiesf 

 We consider them as a speciál sort of animal galls. 



