512 T, A. STEPHENSON 
TEXxT-FIG, 4. 
— 
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eS \ 
SS 
SS 
SSSSS 
S 
Transverse sections of mesenteries, to show various types of muscu- 
Mesogloea black, endoderm white. A, Epiactis; 
lature. 
c, Cryptodendron; D, Actinotryx; 
B, Aureliania; 
BE, Phymanthus. 
