30 Journal of Entomology and Zoology 
EXPLANATION OF FIGURES 
Fig. 1. Cross section through the gill region showing gill opening. D. N., dorsal 
nerve. D. V., Dorsal vessel. G. O., gill openings. A, alimentary corps. G, gill. 
V. N., ventral nerve. V. V. ventral vessel. N., nervous tissue. X40. 
Fig. 2. Cross section through the base of the proboscis showing diverticulum wall 
and proboscis gland. D., diverticulum. N., nervous tissue. P. G., proboscis gland. 
X40. 
Fig. 3. Longitudinal section through a gill opening. N,. nervous tissue. G., gill. 
G. O., gill opening. X40. 
Fig. +. Cross section through the center of the proboscis. N., nervous tissue. 
M. C., muscle in the connective tissue. T., connective tissue. X90. 
Fig. 5. Longitudinal section through the base of the proboscis and collar. M., 
mouth. C. N., central nervous system. H., heart. No., notochord. P. G., proboscis 
gland. N., nervous network. A., alimentary canal. D. V., dorsal ventral. X40. 
Fig. 6. Cross section through the base of the proboscis showing thickened nerve 
network. N., nerve network. D., diverticulum wall. H., heart. X40. 
Fig. 7. Cross section through gill region. D. N., dorsal nerve. D. B. V., dorsal 
blood vessel. G. B., gill vessel. V.N., ventral nerve. V. V., ventral vessel. X40. 
Fig. 8. Longitudinal section through the gill region. G., gills. B. blood. O., 
ovary. N., nervous network. X40. 
Fig. 9. Cross section of alimentary canal. A., wall of alimentary canal. X40. 
Fig. 10. Intestinal epithelium, modified ciliated columnar. X400. 
Fig. 11. Epithelium of the gill, modified ciliated columnar. X400. 
Fig. 12. Nervous tissue. X400. 
Fig. 13. Surface epithelium of proboscis, modified ciliated columnar. X400. 
Fig. 14. Surface epithelium of collar, modified ciliated columnar. X400. 
Fig. 15. Surface epithelium of trunk, modified ciliated columnar. X400. 
Fig. 16. Cells of testis. X400. 
Fig. 17. Ovary. X400. 
Fig. 18. Plain muscle. X400. 
Fig. 19. Epithelium of diverticulum. X400. 
Fig. 20. Connective tissue of proboscis. X400. 
Fig. 21. Muscle bands in proboscis connective tissue. X400. 
