Fig. 11. 
a. Obelia. bcd, Medusae of same (c, everted), bis, 
blastostyle ; coe , common body tissues ; ect, end, ecto 
and endoderm ; ent, stomach ; gth, generative cap- 
sules ; htli, horny cups ; l, lithocyst ; mbd, Medusa 
bud ; mnb, manubrium ; p, horny outer covering ; 
P 1,2,3, feeding polyps ; rad. c., radial canal ; t , 
tentacle ; v, velum. (After Parker and Haswell.) 
