PALEOZOIC OSTRACODA. 99 



IsocHiLiNA. p. 9*7. This is now regarded as a distinct genus, and not 

 as a subgenus of Leperditia. 



10. Leperditia [Isochilina) Ottawa, p. 97, pi. xi, fig. 14. 



11. Leperditia {Isochilina) gracilis, p. 98, pi. xi, fig. 15. 



These are true Isochilince. 



Cytheropsis, p. 98. This is not now applied as a generic term to 

 any fossil Ostracoda. 



12. Cytheropsis concinna, p. 99 {' A. M. N. H.,' April, 1858, p. 254, pi. x, figs. 



3 and 4). 



Being quite smooth and furrowless, it is an Aparchites ; but, if it 

 showed any sign of a dorsal sulcus or central pit it would come under 

 Primitia, and probably be equivalent to Primitia minuta (Eichwald). 

 See Quart. Journ. Geol. Soc, vol. XLYI, 1890, p. 7. 



13. Cytheropsis siliqua, p. 99 {op. cit, p. 249, pi. x, fig. 6). 



This is probably a Macrocypris figured in a reversed position. 



14. Cytheropsis f rugosa, p. 100 {op. cit., p. 249, pi. x, fig. 5). 



This pretty little carapace was almost certainly figured in a reversed 

 position. Its generic position has not been determined. It may pos- 

 sibly belong to Gytherella. 



GENERIC AND SPECIFIC NAMES NOW ADOPTED. 



1. Primitia Logani, Jones, pi. xi, figs, 1-5 ; var. reniformis, fig. 1, and var. leper- 



ditioides, fig- 5. 



2. Leperditia Canadensis, Jones, figs. 6, 7, 9, 10. 



3. " labrosa, Jones, fig. 8. 



4. Leperditia Louckiana, Jones, fig. 11. 



5. Leperditia Pauquettiana, Jones, fig. 12. 



6. Leperditia fabulites (Conrad), fig. 16 (including Josephiana) . 



7. Leperditia Anticostiensis, Jones, fig. 17. 



8. Leperditia Anna, Jones, fig. 13. 



9. Leperditia amygdalina, Jones, figs. 18, 19. 



10. Isochilina Ottawa, Jones, fig. 14. 



11. Isochilina gracilis, Jones, fig. 15. 



12. Aparchites concinnus, Jones, page 99. 



13. Macrocypris ? siliqua, Jones, page 99. 



14. Cytherella ? rugosa, Jones, page 100. 



