PLATE IV. 



Page. 



Fig;. 1. (Jaloneis Liber vur. Bleischiaua JAN. and Rabh. — Nice, '""/j 55. 



■> 2. C. eximia Grun. — Cebu, ^""/j 56. 



■■' 3. C. clavi^era Cl. — Colon, ^o"^^ 5g_ 



» 4. C. Duscniii Cl. — Cameroon, ^'**V, 59. 



•0 5. C. latinscula var. africana Cl. — Caiuercjon, *""/, (52. 



> 6, 7. C. abnonnis Grun. — Lysekil, io"7j 01. 



>. 8. Navicula H. album Cl, — China, '•'"/j Part II. 



-, 9. » » » (part of the valve) '""% :> 



. 10. N. Ypsilon Cl. — Bory, -^""z, » 



> 11. N. clavata var. rhombica Cl. — Morocco, •''"% » 



) 12. N. venustissiraa KiTTON — Hono;kono-, •'^""/, » 



^> 13. N. irrorata var. elliptica Cl. — Hung-ary, '^""/j ■•) 



14. N. Hennedyii var. Centraster Cl. — Mexillones, -^""/j » 



15. Pleurosigma raajus Grun. — Sumatra, -'-•' j 44. 



' 16. P. galapagense Cl. — Galapagos Islands, •^""/, .-56. 



> 17. P. Exsul Cl. — Naples, -^""/i 43. 



> 18. P. forraosum var. A reus Cl. — Macassar Straits, ''""/j 45. 



. 19. P. rainutura GRUN. — Malmo, •'^''"/, 41. 



> 20. P. Heros Cl. — Macassar Straits, "5/^ 44, 



21. P. formosuin var. dalmatica Grun. — Balearic Islands, '^"^"j-^ 45. 



22. P. umbilicatum Cl. — Labuan, •'»"/ 43. 



, 23. Cymbelia hybrida Grun. — Faron, """'/, 166. 



'- 24. C'. HauckiiVAN HeurCK — Triest, i""" 1 1^54. 



> 25. C. oregonica Cl. — Oregon '""o/j 167. 



» 26. C. acutiuscula Cl. — Waltham Mass. i"""/, 164. 



> 27. C. lata Grun. — Pitea, '«07i 165. 



;> 28. C. lapponica Grun. — Gellivaara. """»/, l05. 



