PLATE XL. 

 Rhizostomites admirandtjs (p. 76). 



Photolituograph from the original, natural size. (After Ammon.) 



AS. Mouth disk upon which is the cross of the mouth seam. 

 dp. Perradial areas of the mouth disk. 

 di. Interradial areas of the same. 

 HE. Rough or deep ring. 

 p. Impression of the trunk of a feeding arm. 

 /. Adradial furrow in the deep ring. 

 n. Kidney-shaped plate (probably subgenital opercula). 

 V. Broad marginal border of the same. 

 GB. Smooth ring. 

 W. Ring wall. 



cc. Boundary between the smooth and the furrowed zone (ring canal). 

 ci and ci-p. Interradial canals. 

 cp. Perradial canal. 

 FB. Furrowed ring. 

 me. Circular muscle. 

 1. Marginal lobe, 

 o. Sinus for sense organ. 



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