Keywords: Diatomaceae of Philadelphia Plate 22.jpg follows PLATE 22 <table> <tr> <td style vertical-align top; >Fig </td> </tr> <tr> <td style vertical-align top; >1</td> <td style vertical-align top; >Pleurosigma strigosum Wm Sm </td> </tr> <tr> <td style vertical-align top; >2</td> <td style vertical-align top; >Pleurosigma rigidum Wm Sm </td> </tr> <tr> <td style vertical-align top; >3</td> <td style vertical-align top; >Pleurosigma angulatum Quekett Cl </td> </tr> <tr> <td style vertical-align top; >4</td> <td style vertical-align top; >Pleurosigma obscurum Wm Sm </td> </tr> <tr> <td style vertical-align top; >5</td> <td style vertical-align top; >Pleurosigma formosum Wm Sm </td> </tr> <tr> <td style vertical-align top; >6</td> <td style vertical-align top; >Pleurosigma naviculaceum Bréb </td> </tr> <tr> <td style vertical-align top; >7</td> <td style vertical-align top; >Pleurosigma æstuarii Bréb </td> </tr> <tr> <td style vertical-align top; >8</td> <td style vertical-align top; >Pleurosigma virginiacum H L Smith</td> </tr> </table> https //archive org/details/diatomaceofphi00boye 1916 Charles Sumner Boyer 1856-1928 PD-old-auto-1923 1928 Diatomaceae of Philadelphia |