EXPLANATION TO PLATE XXVIII. 



Kir,. 1. Cladocarpus tenui* Clarke. Part of hydrocladinm (greatly enlarged). (Alter Clarke.) 



2. Cladocarpus tennis. Side view of hydrothecse (greatly enlarged). (After Clarke.) 



3. Cladocurpus yraiidi* Nutting. Part of hydrocladium (enlarged). 



4. Cladocarpux yi-aiidis. Hydrotheca (greatly enlarged). 



5. Clartocarpus granilix. Pliylactocarp and gonangia (enlarged). 



6. Cladocarpus poradisca Allinan. Part of hydrocladium (enlarged). (After Allman.) 



7. ChidocarpiiK paratlisea. I'hvlaetorurp and gonangia (enlargeil). (After Allman.) 



8. Cladocurpiis xpeciosus Vcrrill. Part of hydrocladium (enlarged). 



9. Cladocarpus spcciosiis. Hydrotbeca (greatly enlarged). 



10. Clndoriirpus speciosus. Front of stem showing growing phylactogoninm (enlarged). 



11. Cladocarpus specioxus. Proximal hydrotlieca, and a budding phylactogonium (greatly enlarged). 



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