[McMURRICH] THE ACTINIARIA OF PASSAMAQUODDY BAY 83 
Fig. 
Fig. 
Fig. 
Fig. 
Fig. 
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Fig. 
a 
EXPLANATION OF PLATES. 
PLATE I. 
Urticina felina. Nat. size. 
PLATE Il. 
Transverse section of the sphincter muscle of U. felina. x40. 
Portion of a transverse section of a tentacle from an example of U. felina. 
x120. 
Portion of a transverse section of a tentacle from another example of U. 
felina. x120. 
Puate III. 
Transverse section of a perfect mesentery of U. felina. xs. 
Transverse section of a perfect mesentery of Cribrina stella. x40. 
Transverse section through the sphincter muscle of C. stella. x40. 
