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ALLAN' HANCOCK PACIFIC EXPEDITION'S 



VOL. 4 



PLATE 17 



Fig. 5. .1 (jlaoplicnia symmelnca 



a. Portion of hydrociadiiim to show hydrothecae. 



b. Hydrothecae further enlarged (X40). 



c. Corbuia. 



Fig. 6. AtUrntnilaria com pacta 



Portion of colony to show the arrangement of the hydrocladia and the 

 hydrothecae. 



Fig. 7. Antennularia reversa 



Portion of colony to show arrangement of hydrocladia and hydrothecae. 



