acr. . 
ad. tent. 
bw. 
D. 
dend. tent. . 
ect. 
end. . 
end. msc. 
g- 
m. 
Figure. 
PLATE XXIX. 
LETTERING ON THE FIGURES. 
acrorhagia. 
adhesive tentacles. 
body wall. 
directive mesentery. 
dendritic tentacles. 
ectoderm. 
endoderm, 
muscular layer of endoderm. 
globular tentacles. 
mesogloa. 
mesentery- 
nematocysts. 
nervous layer of ectoderm. 
Sagartia Milmani (H. and 8.), (p. 449). 
0.d.. 
ov. 
periph. tent. 
sph. . 
t. 
tent. . 
v. 
Z00X. 
oral disk. 
cesophagus (stomatodeum). 
esophageal groove (gonidial 
groove). 
ovary. 
parapet. 
peripheral tentacles. 
sphincter muscle. 
testis. 
tentacle. 
verruca. 
zooxanthellae. 
1. Vertical section through the upper portion of the body-wall to show the sphincter muscle, x 25 diam. 
2. Detail of upper (distal) portion of sphincter, x 230 diam. 
. Detail of central portion of sphincter, x 230 diam. 
3 
4. Detail of lower (proximal) portion of sphincter, x 230 diam. 
oy) 
. Transverse section through a mesentery. 
a a) 
Paraphellia Hunti (H. and §.), (p. 461). 
Paraphellia lineata (H. and 8.), (p. 462). 
Detail of upper portion of sphincter, x 230 diam. 
Detail of lower portion of sphincter, x 230 diam. 
Transverse section through part of a primary mesentery, x 50 diam. 
10. Detail of distal portion of sphincter muscle, x 230 diam. 
11. Sketch of proximal portion of sphincter muscle. 
Sagartia plebeia, n. sp. (p. 451). 
Vertical section through the upper portion of the body-wall to show the sphincter muscle, x 50 diam 
12. Vertical section through the upper portion of the body-wall to show the sphincter muscle. 
Desleng 
