THE SENSORY ORGANS. 71 



side the capsule of the neuroblast, with which it is connected 

 by the optic stem. 



The antennal ganglia (PI. III., Fig. 2) exhibit a peculiar 

 grouping of cells in small spherical masses, imbedded in a reti- 

 cular substance. The infra-oesophageal ganglia have a similar 

 structure, but each has a single large group of cells arranged in 

 concentric layers (PI. III., Fig. i, s) with smaller lateral 

 groups (/) scattered through the reticular substance. 



The description of the splanchnic nervous system will be 

 more conveniently given after I have described the remaining 

 structures of the larva. 



8. THE SENSORY ORGANS AND PERIPHERAL NERVE 

 TERMINATIONS. 



With the exception of the sensory papillae, described on 

 p. 36, the only special sensory structures I have been'able'to 



Fig 12.-/. A section of the terminal joint of the Maxilla, showing the eye-liUe 

 organs ; -'. A seciion of the eye-like organ (A o'l immersion lens) ; 3. Endings 

 of a nerve in the hypodermis, showing a peripheral ganglion {' d cotes de melon, 

 Viallanes). 



discover arc the pair of eye-like organs at the extremity of each 

 maxilla. Newport recognised the existence of similar struc- 



