94 MARINE AND FISHERIES 



5 GEORGE v., A. 1915 



Fig. 8. Enallagma signatum. — Lateral gill. 



Fig. 9. Enallagma poUutum. — Dorsal view of head. 



Fig. 10. Enallagma pollutum. — Lateral gill. 



Fig. 11. Boyeria grafiana. — Labium. 



Fig. 12. Boyeria grafiana. — Abdominal appendages of female nymph. 



Fig. 13. Boyeria vinosa. — Labium. 



Fig. 14. Boyeria vinosa. — Abdominal appendages of female nymph. 



PLATE IV. 



Fig. 15. Neurocordulia yamaskanensis. — Nymph. 



Fig. 16. Neurocordulia yamaskanensis. — Terminal abdominal segments of female nymph. 



Fig. 17. Neurocordulia j'amaskanensis. — Lateral view of abdomen. 



Fig. 18. Neurocordulia obsoleta. — Terminal abdominal segments of female nymph. 



Fig. 19. Neurocordulia obsoleta. — Lateral view of abdomen. 



Fig. 20. Leucorrhinia intacta. — Dorsal view of head. 



Fig. 21. Leucorrhinia intacta. — Terminal abdominal segments of female nymph. 



Fig. 22. Leucorrhinia intacta. — Lateral view of abdomen. 



Fig. 23. Leucorrhinia frigida. — Dorsal view of head. 



Fig. 24. Leucorrhinia frigida. — Terminal abdominal segments of female nymph. 



Fig. 25. Leucorrhinia frigida. — Lateral view of abdomen. 



PLATE V. 



Fig. 26. The outer coast and islands, looking westward. Habitat of Group la. 

 Fig. 27. Island off the outer coast, with precipitous shore. Habitat of Neurocordulia yamas- 

 kanensis and Argia moesta putrida (Group la). 



PLATE VI. 



Fig. 28. Rapids, Musquash River. Habitat of Gomphus brevis, Boyeria grafiana, Argia moesta 



putrida, etc. (Group la.) 

 Fig. 29. Small sandy beach with boulders, Station Island. Habitat of Gomphus lividus, G. 



exilis, Macromia illinoiensis, Didymops transversa, etc. (Groups la and lb.) 



PLATE VII. 



Fig. 30. Outlet of Galbraith Lake. A composite of habitats of Group la (current), lb and Ila 



(sublittoral zone). 

 Fig. 31. Outer end of Galbraith Lake. Typical habitat of Group Ila. 



PLATE VIII. 

 Fig. 32. Shore of Burwash Pond, showing sphagnum-cassandra zone, with background of black 



spruce. Habitat of Group lib. 

 Fig. 33. Pond on "Split-rock Island," showing sphagnum-cassandra zone. Habitat of Group 



lib, especially Leucorrhinia frigida and Nehalennia gracilis. 



PLATE IX. 



Fig. 34. Mouth of a small creek. Habitat of Group Ha, passing into that of Group III in the 



distance. 

 Fig. 35. Shallow channel in the sand of Giant's Tomb Island. Habitat of Sympetrum corruptum. 



