142 ON THE MAEINE ALG^ OF THE ' SEALAEK ' EXPEDITION. 



EXPLANATION OF THE PLATES. 



Plate 12. 



6 



Fig. 1. Gloiophlma articulata, n. sp. x g. 



2. Eucheuma Cottonii, n. sp. Nat. size. Two forms. 



3. Calliblepharisprolifera, J. A^B^rdh. x f. 



4. Chylodadia perpiisillay n. sp. x 2* 



5. Fertile portion of a swollen ramulus of Chylocladia perpusilla. X 63 



G. Laurencia pygmma^ n. sp, x 2. 



7. Cladhymenia oblongifolia. X f . 



8. Chondi'ia pumil a, Yick. x f . 



9. Chondria simpliciuscula, n. sp. X £. 



10. 



^? ?> 



Top of frondj with regular rows of hexagonal cells. X 80. 



Heterosiphonia Rendlei, n. sp. X |. 



12, Penieillus of Heterosipho 



X 24. 



Plate 13. 



Fig. 13. Pseudendosiphonia Gardinein, n. gen, et sp, X f • 



14. Top of frond of P$. Gardineri. x 12. 5^ = sticliidia. 



15. Stichidium of P^. Gardineri. X 100. 



16. Dasyopsis Stanleyi^ n. sp. x % 



17. Dasyopsis ajjerta^ n. sp. X ^. 



18. Dasyopsis Geppit^ n. sp. X f. 

 19, 



^y J> 



Underside of thallus^ with clusters of antheridia. X 4 



20. „ „ Antheridium. 



21. Dasyopsis palmatijida, n. s^. x |. 



22. Tapeinodasya Ethel^jBy n. sp. x f 

 23. 



24. Amphisbetema indica (J. Ag,). Nat. size. 



25. Galaooaura hawaiiana^ Eutt. Nat. size. 



4* 



jy y^ Part of frond. X 11 



Plate 14. 



Fig. 26. GloiopJiIcea articulata, n. sp. Section through apex of frond. X 32. 



27. 



j> yy 



Peripheral filament, showing small cortical cells. X 340. 



28. Gloioderma ? eocpansa. Nat. size. 



29. ,, 5, Transverse section, showing large central cells, x 40. 



30. Pseudendosiphonia Gardineri. Section through thallus. x 16. c. = central tube; ;?,c. = pcn- 



r" 



central cells. 



31. Oligocladv^ Prainii^ n. sp. x 32. 



32. Dasyopsis aperta^ n. sp. Part of penieillus. x 46. m. = mother-cell of downward-growing 



hypha. 



33. Dasyopsis Geppit^ n. sp. Young displaced branch, x 130. 



34. Amphisbetema indica. Apex of frond, x 24. 



35. Peyssonnelia Harvey ana. Transverse section. X 128, 



36. Peyssonnelia ? subgen. Ethelia, Section through thallus ; highly magnified. 



37. „ Young plant, section through upper part of thallus; highly magnified- 



