| Fig. | | Page | | ACTINOCYCLUS | | 1 | Actinocyclus barkleyi var. aggregata Rattr. | 27 | | 2 | Actinocyclus moniliformis Ralfs. | 27 | | BIDDULPHIA | | 3 | Biddulphia antediluviana (Ehr.) V. H. | 32 | | 5 | Biddulphia reticulum (Ehr.) | 33 | | 6 | Biddulphia favus (Ehr.) V. H. | 31 | | 7-8 | Biddulphia alternans (Bail.) V. H. | 33 | | TRINACRIA | | 9 | Trinacria pileolus (Ehr.) Grun. | 30 | | DITYLUM | | 4 | Ditylum intricatum (West) Grun. | 30 | | TERPSINOË | | 10 | TerpsinoË americana (Bail.) Ralfs. | 34 | | 11 | TerpsinoË novÆ-cÆsareÆ Boyer | 34 | | | | Fig. | | Page | | ACTINOCYCLUS | | 1 | Actinocyclus barkleyi var. aggregata Rattr. | 27 | | 2 | Actinocyclus moniliformis Ralfs. | 27 | | BIDDULPHIA | | 3 | Biddulphia antediluviana (Ehr.) V. H. | 32 | | 5 | Biddulphia reticulum (Ehr.) | 33 | | 6 | Biddulphia favus (Ehr.) V. H. | 31 | | 7-8 | Biddulphia alternans (Bail.) V. H. | 33 | | TRINACRIA | | 9 | Trinacria pileolus (Ehr.) Grun. | 30 | | DITYLUM | | 4 | Ditylum intricatum (West) Grun. | 30 | | TERPSINOË | | 10 | TerpsinoË americana (Bail.) Ralfs. | 34 | | 11 | TerpsinoË novÆ-cÆsareÆ Boyer | 34 | |
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