PLATE X. 
LETTERING ON THE FIGURES. 
ect. . . . ectoderm. m. . . . mesogloea. 
end.. . . endoderm. @s. . . . cesophagus. 
Sagartia Carlgreni, nu. sp. 
Figure 
1. Vertical section through sphincter muscle of a considerably retracted specimen, x 75. 
2. Transverse section through the body-wall and a mesentery in the cesophageal region, x 75. 
Mitactis Australia, nu. sp. 
3. Vertical section through sphincter muscle, x 75. 
4. Transverse section through the body-wall and a mesentery in the cesophageal region, x 75. 
Mitactis similis, nu. sp. 
. Vertical section through sphincter muscle, x 75. 
6. Transverse section through the body-wall and a mesentery in the cesophageal region, x 75. 
Or 
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