FIG. 96. Obelia sp. yl, portion of a colony with certain parts shown in longitudinal section ; 

 -B, medusa ; C, the same with reversed umbrella ; D, the same, oral aspect ; Bd. 1, 2, buds ; 

 bis. blastostyle ; cce. coenosarc ; ect. ectoderm ; end. endoderm ; ent. enteric cavity ; g.th. 

 . gonotheca ; h.th. hydrotheca ; /. lithocyst ; m.bd. medusa-bud ; mnb. manubrium ; msgl. 



ttr> mrmfh 



vnrl /> rarliul 



