396 MARGARET LEWIS NICKERSON. 



EXPLANATION OF PLATE XXXIV. 



Fig. I. Section through non-glandular organ of second type showing four 

 sensory cells. X 460. 



Fig. 2. Section of non-glandular organ of first type, x 512. 



Fig. 3. Section through non-glandular organ of first type showing two sen- 

 sory cells and their connection with nerve from ventral cord. X 512. 



Fig. 4. Section of non-glandular organ of second type showing sensory hair 

 and connection of sense cells with nerve from ventral cord, x 460. 



Fig. 5. Section of glandular organ of first type showing five sensory cells. 

 X 5x2. 



Fig. 6. Section through non-glandular organ of second type showing two 

 sensory cells. X 460. 



Fig. 7. Section of non-glandular organ of second type, x 460. 



Fig. 8. Section of glandular organ of second type showing four sense cells 

 and refractive bodies representing the intracellular sacks, x 460. 



Fig. 9. Section of glandular organ of second type, x 460. 



^IG. 10. Section through non-glandular organ of first type. X 512. 



Fig. II. Section of non-glandular organ of second type showing two sensory 

 cells and peripheral terminations. X 460. 



Fig. 12. Section from glandular organ of second type showing one sensory 

 cell with its peripheral ending and intracellular sacks, x 512. 



Fig. 13. Section through glandular organ of first type showing three gland 

 cells and one sense cell. X 512. 



Fig. 14. Section showing relation of main nerve to ventral cord. These main 

 nerves contain the central processes from the sensory cells. X 84. 



