IV 



PHYLUM CCELENTERATA 



199 



FIG. i IT. -Pennatula sulcata. A, entire colony; B, portion of the same magnified. 

 /. lateral branch ; />. polype ; . siphonozooid. (After Koelliker.) 



L.m, 



FK.. H-. Tubipora musica. A, skeleton ol entire colony ; B, transverse sections of polype ; 

 C. single polype with tube and commencement of platform : D. growth of new polypes from 

 platform. /. //i. longitudinal muscles ; pi. p2. polypes ; pi. platform ; tfipk. siphonoglyphe ; sp. 

 ppicules ; st<L stomodseum. (After Cuvier, Quoy and Gaimard, and Hickson.) 



