44 



INDEX. 



PLEUROSIMA. 



attcnuatuin, xxx, 2. 

 Balticum, xxxii, 5, 6. 

 decorum, " 4. 

 delicatulum, xxii, -'2. 

 elongatum, xxxii, 2. 

 t-xi min m, 14. 



Fascicola, 11. 



formosuni, " 8, 9. 

 Hippocampus, xxxii, 7. 

 Kvitzingii, 13. 



Macrum, 1. 



nubecula, xxx, 4. 

 obscurum, " 1; xxxii, 12. 

 obtnsatum, " 13, 14. 

 pulchrum. xxxii, 3. 

 quadratum, xxx, 10. 11. 

 rigidum, " 3. 



sciotense, " 12. 

 Spenceri. " 6, 8. 

 virgiiiiacum, xxxi, 7. 



PODOCYSTIS. 



Americana, li, 14, 18. 

 Adriatica, li, 19. 



PODOSIRA. 



argus, lix, 4. 

 Febigerii, lix, 10, 12, 13. 

 hormoides, lix, 14-16. 

 maculata, Ixix, 4, 5. 

 Montagnei, lix, 17, 18. 

 stellulifera, " 11. 

 variegata. Ixix, 3. 



PODOSPHENIA. 



Baileyi, Ixix, 1. 2. 

 papeana, xxii, 26, 27. 



PORPEIA. 



quadrata, Ixvi, 33. 

 ([iiadriceps, Ixvi, 25, 30. 



PsEUDO-AULISCUS. 



radiatus, Ixxxiv, 6. 



PYXIDICULA. 



compressa, Ixii, 17. 

 cristata, " 9. 



cruciata, " 7, 11. 

 iri-ras. " 30. 



globata, xxii, 2, 3, 4. 

 lens, Ixii, 10. 

 limbata, 1.x ii, s. 

 nrreolaris, Ixii, 19. 



I'VXILt.A. 



Americana, Ixv, S, 17, 18. 



boreale, Ixv, 20, 23. 

 dubia, " 24. 

 Kittoniana, Ixv, 21. 

 subulata. " 19. 



RAPHIDODISCUS. 



Christiana, Ixxxiv, 2. 

 Febigerii, 3, 4. 



Marylandica, " 1. 



RAPHONEIS. 



amnis, Ixiii, 25. 

 amphiceros, xxxvii. IS -22. 

 Archeri, Ixiii, 29. 

 Belgica, Ixviii, 3. 

 cooconeis, xxxvii, 11. 

 rluminensis, Ixviii, 5. 

 t'usciis, Ixiii. 39. 

 gemmifera. xxxvii, 17. 

 linearis, Ixiii, 28. 

 Oregonica, Ixviii, 4. 

 Petropolitana, Ixiii, 2(i. 

 pretiosa, xxxvii, 15. 

 scalaris, 16. 



RHAHDONKMA. 



adriaticiim, li, 2, :!, 4. 



arenatum, li, 5, 6, 7. 



Atlanticum, Ixiii, 17. 



t'rustule, xxxiv, 20. 



minutum, li, 8-11. 

 RHIPIDOPHORA. 



paradoxa, xxix. 3, 4. 



RHIZOSOLENIA. 



Americana, Ixv, 



calypta, 



Eriensis, 



gracilis, 



ornithoglossa," 7. 



pileolns, Ixiv, 21. 



styliformis, Ixviii, 28, 29. 



RHOICOSPHENIA. 



curvata, xxvii, 17, 18, 19, 20, 21. 



RUTILARIA. 



epsilon, Ixviii, 1. 

 hexagona, " 2. 



SCEPTRONEIS. 



caduceus, xxxvii, 13. 

 gemmata. 14. 



nitzschioidt-s," 12. 



SOHIZONEMA. 



AmiM'icannin, xxviii, 13. 

 romoides, 11, 12. 



6. 

 2. 



1. 



