aer. . 
ad. tent. 
b. w. 
D. 
ect. « 
end. . 
end. mse. 
g- 
m. 
Figure. 
dend. tent. . 
acrorhagia. o.d.. 
adhesive tentacles. @s. 
body-wall. @s. gr. 
directive mesentery. 
dendritic tentacles. ov. 
ectoderm. Dx Noses cee 
endoderm. periph. tent. 
muscular layer of endoderm. sph. . 
globular tentacles. t. 
mesogloa. tent. . 
mesentery. . 
nematocysts. 200%. 
nervous layer of ectoderm. 
Radianthus macrodactylus (H. and 8.), (p. 471). 
PLATE XXXI. 
LETTERING ON THE FIGURES. 
oral disk. 
cesophagus (stomatodzeum). 
cesophageal groove (gonidial 
groove). 
ovary. 
parapet. 
peripheral tentacles. 
sphincter muscle. 
testis. 
tentacle. 
verruca. 
zooxanthelle. 
1. Vertical section through the upper portion of the body-wall to show the sphincter, x 12 diam. 
2. Section through the sphincter muscle, x 50 diam. 
3. Section through the sphincter muscle and a sucker (verruca), x 50 diam. 
Radianthus Malu (H. and 8.), (p. 472). 
4, Vertical section through the upper portion of the body-wall to show the sphincter, x 15 diam. 
5. Section through the sphincter muscle, x 100 diam. 
Stoichactis Kenti (H. and 8.), (p. 478 ). 
6. Vertical section through the upper portion of the body-wall to show the sphincter, x 15 diam. 
7. Section through the sphincter muscle, x 100 diam. 
Stoichactis Haddoni (S.-K.), (p. 474). 
8. Section through the sphincter muscle, x 50 diam. 
Phymanthus muscosus (H. and 8.), (p. 496). 
9. Section through the sphincter muscle, x 100 diam. 
feeplse a] 
“Ali's Ae 
