| Navicula bacillum Ehrenb., 1839 |
| Navicula baileyana Grunow ex A.W.F. Schmidt, 1874 |
| Navicula bifissa A. Schmidt, 1897 |
| Navicula bigemmata A. Mann, 1925 |
| Navicula bilobata Leud.-Fortm., 1879 |
| Navicula binodulosa M. Sullivan & Reimer, 1975 |
| Navicula brachium Hust., 1944 |
| Navicula brasiliensis Grunow, 1863 |
| Navicula brevissima Hust., 1937 |
| Navicula campylodiscus Grunow, 1875 |
| Navicula cancellata Donk., 1872 |
| Navicula capitata Ehrenb., 1838 |
| Navicula capitatoradiata Germain, 1981 |
| Navicula cari Ehrenb., 1836 |
| Navicula cari var. angusta (Grunow) Grunow, 1885 |
| Navicula cari var. cari Ehrenb., 1836 |
| Navicula cari var. recens Lange-Bert., 1980 |
| Navicula caribaea Cleve, 1874 |
| Navicula carinifera Grunow, 1874 |
| Navicula challengeri Grunow, 1880 |