EXPLANATION TO PLATE XXVII. 



FIG. 1. Cladocarpns oMiqiiug Nutting. Part of hydrocladinm (enlarged). 



2. CladncHi'iin oblti/inis. Side view of byilrotheca (greatly enlarged). 



3. CJadocarpu* obliquua. Phylactogonia anil gouangia (enlarged). 



4. Cladocarpua seplatiis Nutting. Part of hydrocladium (enlarged). 



5. Cladocarpui seplatuv. Side view of hydrotheca (greatly enlarged). 



6. Cladocarpiis seplalna. Front view of hydrotheca (greatly enlarged). 



7. Cladocarpiis septatus. Front of stem (greatly enlarged). 



8. Cladocarpiis septatus. Phylactogouia and gonaugia (enlarged). 



9. Cladocarpiis dolicliotlieca Allman. Part of colony showing phylactogonia and gonangia (enlarged). (After 



Allinan.) 



10. Cladocarpus dolichotheca. Side view of hydrotheca (greatly enlarged). (After Alliuan.) 



11. Cladocarpiix flejcuosus Nutting. Part of hydrocladinm (enlarged). 



12. CladocarpiiK Jlexnosns. Front view of hydrotheca (greatly enlarged). 



13. Cladocarpiis flexnosua. Side view of hydrotheca (greatly enlarged). 



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