152 ALLAN HAXCOCK PACIFIC EXPEDITIONS VOL. 4 



PLATE 21 



Fig. 11. Serlulaiflla creita 



Portion of stem showing arrangement of hydrothecae. 



Fig. 12. Aglaophcnia proini/wris 



a. Portion of hydrocladium showing hydrothecae. 



b. Portion of hydrocladium further enlarged (X40). 



c. Face view of hydrotheca (X40). 



d. Corbula. 



Fig. 13. PI u miliaria micronema 



a. Portion of stem \vith hydrocladia and h\drothecae. 



b. Two hydrothecae further enlarged (X40). 



c. Portion of colony showing gonangia. 



Fig. 14. Pliiinitlaiia septata 



a. Portion of stem with hydrocladia and hydrothecae. 



b. Portion of colony \vith gonangia. 



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