PLATE T. 



Pig. 1. Amphiplenra pellucida var. Truani V. H. — Spain, '•'""/i Part I, 127' 



2. Pleurosigraa prfeloiigum Cl. — Greenland, ^^^/i » 39. 



3, 4. Gyrosigraa aroticum Cl. var. — Kergueleiis Land, ^^Vi » 119- 



5. G. sciotense Sull. — Hudson Eiver, ^""Ji » 118. 



6. G. diaphanum Cl. — Ue de Bréhat, ^'"'/i » 115- 



7. Caloneis Beccariana Grun. — Bengal, ^°°''/i » 50. 



8. C. Anderssonii Cl. — Galapagos Islands, ■'""/i » 60- 



9. C. Musca var. eurynota Cl. — Eio Janeiro, ^"^i * 65. 



10. C. Hardmaniana Cl. — Carapeachy Bay, ^""/i » 67. 



11. N. Omicron Cl. — Galapagos Islands," "•'""/i Part II, 46. 



12. Pinnularia cardinaliculus Cl. — Waltliara, Mäss » 79. 



13. P. spitsbergensis Cl. — Spitsbergen, ^"""/i » 82. 



14. P. constricta Cl. — Galapagos Islands, ^""A 98. 



15. P. lignitica Cl. — Japan, ^'">°/i '. 85. 



16. P. Aestuarii CL. — Connecticut, ^"71 93. 



17. Navicula My Cl. — China, ""»Vi 42. 



18. Pinnularia Balfouriana Grun. — Aberdeen^), ''°°/'i 80. 



19. Navicula brasiliensis Grun. var. bicuneata Cl. — Pensacola, ^^""/i 48. 



20. Pinnularia paulensis Grun. — Demerara River, ^'"'Vi 86. 



21. P. trigonocephala Cl. — Big Lake, Cal., ^""/i 88. 



22. P. major var. asyrametrica Cl. — Waltham Mass., ''°°/i 89. 



23. P. flexuosa CL. — Crane Pond, "^"''/i 93. 



24. P. Claviculus var. javanica CL. — Java, ^'"^''/i 97. 



25. Navicula concilians Cl. — Honolulu, ^""/i 54. 



26. N. Schulzii Kain var. californica Cl. — S:n Pedro, Cal., ^"^i 45. 



27. N. Stercus musoarum Cl. — Chiua, ''"^A 55. 



28. N. glacialis Cl. — Matotchin Scharr, ^"""/i 40. 



29. N. Chi Cl. — Balearic Islands, ^"""/i 37. 



30. N. Rhaphoneis Grun. — Samoa, """A 36. 



» 31. N. Ainicorura Grun. — Samoa, """Vi 36. 



» 32. N. subalata Grun. — Seychelles, "•'""ji 35. 



» 33. N. Formenteree Cl. — Balearic Islands, ""^i 32. 



» 34. N. Phi Cl. — Seychelles, ""»A 34. 



» 35. N. centraster Cl. — Madagascar, ^^'"'/i 32. 



» 36. N. pennata A. S. var. maxima CL. — Naples, •''"Vi 33. 



» 37. N. leptostigma Ehb. — Oregon, ^"""/i 24. 



7> 38. N. annulata Grun. — Demerara River, ■'""/i 33. 



') From a sketch sent by Grunow. 



