PLATE XXL 



Figure 1. Melosira hyalina, n. sp. 



„ 2. Melosira thaitiensis, n. sp. 



Figures 3 and 5. Corethron hispidum, n. sp. 



Figure 4. Corethron murrayanum, n. sp. 



„ 6. Corethron (?) sp. (?), forma juvenis 



,, 7. Melosira sol, Ehrenb., var. nov. 



„ 8. Heterodictyon jeffreysianum, u. sp. 



,, 9. Hemiaulus, sp. (?), valva terminalis (?) 



10. Melosira glomus, n. sp. 



,, 11. Melosira, sp. (?) 



,, 12. Corethron criophilum, n. sp., var nov. 



,, 13. Hemiaulus, sp. (?), valva terminalis (?) 



,, 14. Corethron criophilum, n. sp. . 



,. 15. Corethron criophilum, n. sp., var. nov. 



„ 16. Melosira ivestii, W. Sm. 



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