PLATE IT. 



FIf!. 



1. HuxLEYA FRAGiLis^ p. 27. After Busk. 



2. Brettia TUByEFORMis^ p. 28. Scc Platc y. 



3. Aetea truncata, p. 8 ; erect and pedicellate form. 



4. Eucratea chelata, p. 14; showing the creeping 



line of cells, from which the shoots spring. 



5-7. , showing the primary cell and the first 



stages of the colony. 



8. ; primary zooecia. 



