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ALLAN' HAXCOCK PACIFIC EXPEDITION'S 



VOL. 4 



PLATE 4 



Fig. 15. EuJrnJriuin nodosum 

 Portion of colony. 



Fig. 16. Hydractinia disjtinita 



a and b. Nutritive zooids. 



c and d. Female generative zooids. 



e and f. Spines. 



Fig. 17. Hydractinia epispongia 



a and b. Nutritive zooids. 



c and d. Male generative zooids. 



e. Dactylozooid. 



Fig. 18. Hydractinia hancocki 



a. Nutritive zooid. 



b. Female generative zooid. 

 C. Male generative zooid. 



d. Basal network with spheroidal bodies. 



Fig. 19. Hydractinia longispina 



a. Nutritive zooid. 



b. Female generative zooid. 



c. Male generative zooid. 



d. Spine. 



Fig. 20. Hydractinia multispina 



a and b. Nutritive zooids. 



c. Female generative zooid. 



d. Spine. 



