EXPLANATION OF PLATE VI. 
Campanulina ceylonensis (Browne). 
Fic. 1.—Optical section of the young gonosome growing from the 
base of a hydrosome, before the formation of any 
medusoid buds. 
FIGS. 2, 3, 4.—Similar views of gonosomes at somewhat later 
stages showing the early formation of the first bud. 
Fic. 5.—A gonosome with one medusoid. 
6.—Upper part of a gonosome showing communication be- 
tween the cavity of the operculum and the enteron of 
the medusoid. 
7.—Gonosome at a later stage, showing the marginal lappets. 
8.—Gonosome at a slightly earlier stage than fig. 7, in opti- 
cal section. 
g.—Gonosome, probably mattre: a, marginal tentacles: bd, 
velum: c, sense vesicle. Cells resembling phagocytes 
can be seen in the operculum and in the lower part of 
the blastostyle. 
+) 
) 
All figures drawn to scale with the Camera lucida from stained preparations. 
