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ALLAN HANCOCK PACIFIC EXPEDITIONS 



VOL. 4 



PLATE 20 



Fig. 6. Halecium tcnue 



a. Colony showing hydrophore arrangement and face 

 view of gonangium. 



b. Side view of gonangium. 



Fig. 7. Opliiodissa allcrnata 



a. Portion of colony to show hydrophore arrangement 

 and tentacular organs. 



b. Portion of colony showing gonangia. 



Fig. 8. Scandia fxpansa 



a, b, and c. Hydrothecae. 



Fig. 9. Eucryptolaria piniiata 



a. Portion of main stem. 



b. Portion of branch. 



Fig. 10. Sertiilarrlla claiisa 



a. Portion of stem showing branching, hydrothecae 

 and gonangium. 



b. Portion of branch. 



