122 PROF. A. D. IMMS ON 



V. EXPLANATION OF THE PLATES. 



The figures were made with a Leitz drawing apparatus under various magnifi- 

 cations. Wherever arrows are represented they indicate the direction of the anterior 

 end of the bodj'. 



PlATE VI. 



Pseudachorutes anomalus, sp. ii. 



Fig. 1. The right mucro viewed from the lateral aspect. 



2. The eyes and post-antennal organ of the right side. 



3. The right foot of the first pair of legs. 



4. An outline figure of the furcula seen from the dorsal side. 



Xenylla ohscura, sp. u. 



Fig. 5. An outline figure of the dorsal aspect of the furcula. 



6. A dorso-lateral view of the anal spines and their papillae. 



7. The mucro and apical portion of the dens of the left side viewed from the 



inner aspect. 



8. Thehamula. 



9. The right leg of the first pair. 



Neanura pudibnnda, sp. n. 



Fig. 10. The antenna, eyes, and post-antennal organ of the left side. 



11. The left foot of the third pair of legs. 



12. The insect viewed from the dorsal side. 



Neanura intermedia, sp. n. 



Fig. 13. The left antenna seen from the dorsal aspect. 

 14. The left foot of the first pair of legs. 



Isotoniurus palustris Miill. 

 Fig. 15. The mucro, together with the apex of the dens ; right side. 



Isotoma siva, sp. n. 



Fig. 16. The left foot of the first pair of legs. 



17. The mucro and apex of the dens of the left side ; viewed from the outer 



side. 



18. The eyes of the right side. 



Plate VII. 

 Isotoma siva (continued). 

 Pig. 19. The insect seen from above. 



Neanura intermedia (continued). 

 Fig. 20. The ej^es of the left side. 



Isotomurus pahistris (continued). 



Fig. 21. The right foot of the first pair of legs seen from the inner side. 

 22. The eyes and post-antennal organ of the right side. 



Neanura corallina, sp. n. 



Fig. 23. The insect viewed from above. 



24. The left antenna seen from the ventral aspect. 



25. The eyes of the left side. 



26. The third leg, left side. 



Isotoma nigro'punctata, sp. n. 



Fig. 27. The eyes and post-antennal organ of the right side. 



28. The right foot of the third pair of legs seen from the inner aspect. 



29. The apex of the dens of the right side together with the mucro. 



