PHYLUM CCELENTERATA 



199 



j--^^''^, 



Fig- 147. — Pennatula sulcata. A, entire colony; B, portion of the same niag-nifiedj 

 /. lateral branch ; p. polype ; s. siphon ozooid. (After Koellikcr.) 



Fio. US. — Tubipora xnusica. A, skeleton of entire colony ; B, transverse sections of polype ; 

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

 platform. I. m. longitudinal muscles ; pi. p'^. polypes ; pL. platform ; sgph. siphonoglyphe ; sp. 

 spicules ; std. stomodasum. (After Cuvier, Quoy and Gaimard, and Hickson.) 



