CONTENTS 



PAGE 



Subclass 3. Melanophyceae 387 



Series 1. Phaeosporeae 389 



Order 1. Sphacelariales 390 



Family 1. Sphaeelariaceae 391 



1. Sphacelaria 392 



2. Chaetopteris 397 



Order 2. Ectocarpales 398 



Family 2. Ectocarpaceae 400 



3. Pylaiella 401 



4. Ectocarpus 407 



5. Streblonema 440 



Family 3. Myrionemataceae 453 



6. Myrionema 454 



7. Compsonema 473 



8. Hecatonema 488 



9. Microspongium 492 



Family 4. Ralfsiaceae 493 



10. Ralfsia 494 



11. Hapterophycus 499 



12. Lithoderma 500 



Family 5. Elachisteaceae 502 



13. Elachistea 503 



14. Gonodia 505 



Family 6. Leathesiaceae 507 



15. Petrospongium 508 



16. Leathesia 510 



Family 7. Punctariaceae 513 



17. Punctaria 515 



Family 8. Asperococcaceae , 522 



18. Halorhipis 523 



19. Soranthera 525 



20. Myelophycus 527 



Family 9. Striariaceae 528 



21. Striaria 529 



22. Stictyosiphon 530 



Family 10. Scytosiphonaceae 530 



23. Scytosiphon 531 



24. Ilea 535 



25. Endarachne 538 



26. Colpomenia 539 



27. Hydroclathrus 542 



Family 11. ^Egiraceae 543 



28. iEgira 544 



29. Meneghiniella 548 



Family 12. Heterochordariaceae 549 



30. Heterochordaria 550 



[383] 



