1909] Trachael Supply, Nervous System Corydalis 



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The small branches within the ganglion run straight or in broad 

 curves to a considerable extent, while the finer branches in the 

 connectives are often wavy. (Fig. M.. & N.) 



A few ends were found, but no clear case of anastomosis either 

 between systems or between branches of the same system, 

 although it looked like it in many places because of the great 

 length and intricate windings of the finest tracheoles. From the 

 smallest tracheoles also there were comparatively few branches 

 although single ones could be traced for long distances. 



The connectives gave a good chance to study the distribution 

 of the finer branches and their relation to each other. Here 

 although tw^o systems overlapped, no anastomosis could be found. 

 (Fig. L.) 



SUMMARY. 



1. There is a very intricate and extensive supply of both 

 tracheal branches and capillaries to the central nervous system of 

 Corydalis larva. 



2. There are three main branches to the brain on each side, 

 entering it laterally and ventrally. 



3. There are two pairs of branches to the subesophageal. 



4. There are three branches, two paired and one unpaired, 

 to the first thoracic ganglion. 



5. There is but one pair of branches to all the other ganglia 

 except the eighth. 



6. The eighth ganglion has tw^o sources of tracheae. Two 

 branches from the seventh abdominal ganglion and two from the 

 caudo-lateral region of the animal. 



7. The supply to the connectives in all cases but one, is from 

 the tracheal systems of the ganglia. 



8. The supply to the long connectives between the subesoph- 

 ageal and first thoracic ganglion is in part from both of these 

 ganglia and its middle portion is supplied by a small lateral tra- 

 cheal tube. 



9. Nerves supplied by only one small tracheole may have 

 this forming a very complete network. 



10. The frontal ganglion is supplied from the brain on each 

 side along the small connective and also from two small lateral 

 tracheae not connected with the brain. 



11. There is a superficial and a deep supply to each ganglion 

 and a very intricate network in each. 



