296 Transactions of the Canadian Institute. [vol. ix 



Fig. 3. Eylais falcata Koen. Right maxillary palpus. From prepar- 

 ation 115. Obj. 3X0C. 2X18 cm. tub. (X81). 

 Fig. 4. Eylais desecta Koen. Eye-plate. From preparation 656. 



Obj. 3X0C. 5X18 cm. tub. (XI77)- 

 Fig. 6. Eylais triangulijera Koen. Eye-plate viewed from beneath. 



From preparation .661. Obj. 3X0C. 4X20 cm. tub. 

 Fig. 7. Eylais triangulifera Koen, Right palpus. From preparation 



661. Obj. 5X0C. 0x14cm. tub. (X114). 

 Fig. 8. Eylais marshaUcB Koen. From the type preparation in Ottawa 



(Museum of the Geological Survey). (X121.) 

 Fig. 9. Eylais marshallcB Koen. From the type preparation in Ottawa 



(Museum of the Geological Survey). (X121.) 

 Fig. 1 1. Eylais marshallcB Koen. From the type preparation in Ottawa 



(Museum of the Geological Survey). (X106.) 

 Fig. 16. Lebertia tyrrelli Koen., n. sp. From the type preparation in 



Ottawa (Museum of the Geological Survey). (X460.) 

 Fig. 17. Lebertia wolcotti Koen., n. sp. From preparation 11 23. Length 



of the organ 0.265 n^^^- 

 Fig. 18. Lebertia wolcotti Koen., n. sp. Left palpus. From preparation 



1123. (X270.) 



Plate II. 



Fig. 2. Eylais falcata Koen. Eye-plate, viewed from beneath. From 



preparation 1331. Obj. 3X0C. 4X20 cm. tub. (X135). 

 Fig. 5. Eylais desecta Koen. Capitulum, viewed from beneath. From 



preparation 656. Obj. 3X0C. 4X20 cm. tub. (X145). 

 Fig. 10. Eylais marshallce Koen. From the type preparation in Ottawa 



(Museum of the Geological Survey). (X106.) 

 Fig. 12. Thyas stolli Koen. From preparation 1323. Obj. 5X oc. 4X14 



cm. tub. 

 Fig. 13. Lebertia tyrrelli Koen., n. sp. From the type preparation in 



Ottawa (Museum of the Geological Survey). (X92.) 

 Fig. 14. Lebertia tyrrelli Koen., n. sp. From the type preparation in 



Ottawa (Museum of the Geological Survey). ( X325.) 

 Fig. 15. Lebertia tyrrelli Koen., n. sp. From the type preparation in 



Ottawa (Museum of the Geological Survey) . ( X 380.) 

 Fig. 19. Lebertia wolcotti Koen., n.sp. From preparation 11 23. Length 



of epimft-al shield 0.747 mm. (X64.) 

 Fig. 20. Lebertia setosa Koen. From preparation 52. (X43.) 



