iQog] Trachael Supply, Nervous System Corydalis 57 



EXPLANATION OF PLATES. 



All tijj;ures indicated by letters are from photographs of the central 

 nsrvous system of Corydalis cornuta larva. The dark lines and darker jjarts 

 of the figures indicate tracheal tubes or dense masses of tracheoles. 



Plate VIII. 

 Fig. A. Brain and part of the subesophageal ganglicni from below. 



X 28.5. 

 Fig. B. vSubesophageal ganglion from below. X 28.5. 

 Fig. C. Second thoracic ganglion from below. X 23.5. 

 Fig. D. Third thoracic (larger), and first abdominal ganglion from below. 



X 23.5. 

 Fig. E. Abdominal ganglion from below. X 23.5. 

 Fig. F. Seventh and eighth abdominal ganglia from below. X 23.5. 



Plate IX. 



Fig. G. Two thirds of the brain from below. X 50. 

 Fig. H. Subespohageal ganglion from below. X 50. 

 Fig. I and J. Abdominal ganglia from below. X 50. 



Plate X. 

 Fig. K. Upper portion of a thoracic ganglion showing larger branches only. 



X 50. 

 Fig. L. Part of two connectives showing the mingling of two tracheal systems 



in each. X 80. 

 Fig. M. Abdominal ganglion from below at one focus. X 80. 

 Fig. N. Abdominal ganglion from below, same specimen as Fig. M, only at a 



different focus. X 80. 



PLATES XI AND XII. 



Camera lucida drawings of the main tracheal branches in each of the ganglia 

 of larval corydalis. Chiefly from a single speciinen. Each is drawn from below 

 and the scale at the left is equal to one half mm. 



Plate XI. 

 One half of the brain showing the main branches. 



One half of the brain of another specimen, showing most of the branches 

 that can be seen from one side. 

 Subesophageal ganglion. 

 First thoracic ganglion. 

 Second thoracic ganglion. 

 Third thoracic ganglion. 



Plate XII. 



First abdominal ganglion. 



Second abdominal. 



Third abdominal. 



Fourth abdominal. 



Fifth abdominal. 



Sixth abdominal. 



Seventh and eighth abdominal ganglia. 



