CONTENTS. 



12. Leperditia Hisingeri, var. egena, noi'. Grand Rapids, Saskatchewan 



River 



13. alta {Conrad). Schoharie, N. Y 



14. phaseolus {Hisinger). Roche Rouge, Saskatchewan River 



15. phaseolus, var. Guelphica, nov. Durham, Ontario - 



16. marginata, Schmidt. Long Point, Lake Winnipegosis 



17. Whiteavesii, nov. Chemahawin and Cedar Lake 



18. coeca, nov. Below Cedar Lake and Grand Rapids - 



19. Selwynii, nov. Jupiter River, Anticosti - - - 



C. From the Devonian Rocks. 



1. Aparchites mitis, nov. Hay River and Athabasca River - - - 



2. Primitia scitula, nov. Hay River. ----- - - 



3. Isochilina bellula, nov. Hay River - - 



4. Dawsoni, nov. Island on west side of Dawson Bay, Lake 



Winnipegosis - - - ------ 



5. Elpe Tyrrellii, no?\ Island on west side of Dawson Bay, Lake Winni- 



pegosis 



6. Leperditia (?) exigua, nov. Island Z, Lake Winnepigosis 



7. Ulrichia Conradi, Jones. Thedford, Ontario - - - - - 



8. Primitiopsis punctulifera (Hall). Thedford, Ontario 



9. Kirkbya (?) Walcotti, Jones. Thedford, Ontario - - - - 



Appendix. 



Notes on the species of Ostracoda described and figured in Decade III, 1858. 



Explanation of Plates X, XI, XII, XIII. 



