196 



CCELENTERATA. 



able of attachment, to foreign bodies by means of a modified prox- 

 imal extremity or " hydrorhiza." A few of the types included in 

 this sub-class are simple (e.g., Hydra), but the organism consists 



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Fig. 78. — Recent Corynida. A, Portion of the colony of Ferigonimus minutus, with polypites 

 and reproductive buds, enlarged about 25 diameters ; b, A single polypite of Bimeria vestita, 

 greatly enlarged, showing the extension of the polypary upon the bases of the tentacles. (After 

 Allman.) 



typically of numerous simple polypites united by a branched 

 " ccenosarc," and forming a plant-like or encrusting colony. Very 



