DESCRIPTION OF PLATES. 



165 



PLATE XVI. 



13. Id)jb0)iea hochstetteriaua, n.s. 

 lli. Id'iihonea hochstetteriaua, ooecium. 

 15. Idmonea hochstetteriaua, var. n.s. 

 1(3. Idmoiiea hochstetteriana, var. n.s. 

 and magnified. 



17. IdiiLuHca atlantica, n.s. and anterior 



and posterior magnified. 



18. Idmonea radians, n.s., a magnified, 



h more liiglily back and front. 



19. Idmonea incurca, n.s. and magni- 



fied. 



20. Idmunea serialis, n.s. and magnified. 



PLATE XVII. 



1. Idmonea inilneana, n.s. and front 



and back magnified. 



2. Idmonea ndlneana, n.s. and mag- 



nified. 



3. Idmonea lata, n.s. and magnified. 



4. Idmonea contorta, n.s. and mag- 



nified. 



5. Idmonea contorta. 



6. Idmonea trigona, n.s. and magnified. 



7. Idmonea geminata, n.s. and mag- 



nified. 



8. Idmonea atlantica, n.s. and mag- 



nified. 



9. Idmonea venasta, n.s. and mag- 



nified. 

 10. Idmonea ventista. 



PLATE XVIII. 



1. Idmonea divergens, n.s. and mag- 



nified. 



2. (Undetermined). 



3. Idmonea conferta, n.s. and mag- 



nified. 



4. Idmonea semispiralis, n.s. and mag- 



nified. 



5. Filisparsa orakeiensis, n.s. and mag- 



nified. 



6. Hurnera curva, n.s. and magnified. 



7. Rornerafrondiculata, n.s. and mag- 



nified. 



8. Uornera frondicidata. 



9. Uornera elevata, n.s. and mag- 



nified. 

 10. Uornera quadrata, n.s. and mag- 

 nified. 



BB 



