FIG. 78. Obelia. A, portion of a colony with certain parts shown in longitudinal 

 section (x 10) ; B, medusa (x 5) ; C, the same with reversed umbrella ; 1), the 

 same, oral aspect. Bd. i, 2, buds ; bis. blastostyle ; cce. coenosarc ; ect. ectoderm ; 

 end. endoderm ; ent. enteric cavity ; g. th. gonotheca ; h. th. hydrotheca ; /. litho 

 cyst ; m. bd. medusa-bud ; mnb. hypostome or manubrium ; msgl. mesogloea ; 

 mtk. mouth ; p. pprisarc ; P. r, 2, 3, polypes ; rod. c. radial canal ; t. tentacle : 

 vl. velum (From Parker and Haswell's Zoology, reduced.) 



