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Fic. 19.—Restoration of Rhizostomites, seen from below, after Brandt. The relative dimensions were taken into 
account so far as possible. For the purpose of more accurate topographic orientation, there were drawn at the edge of the 
umbrella, besides the 128 edge lobes, also the 16 rays in which the radial canals terminated, in analogy with living forms. 
For the same reason also the position of 8 marginal bodies and of the circular canal was hypothetically indicated. In the 
middle of the drawing the peduncles, and the mouth disk produced by their blending, wereintroduced. Themouth disk sends 
out 8 arms, which have been drawn as if cut off at their base. On the mouth disk lies the mouth cross, whose secondary arms 
continue on the oral edges of the arms. Dotted lines indicate the lids of the genital cavities, and of the cwlenteric central 
cavity. 
A. Dome of the disk (umbrella). 
B. Mouth disk (stem). 
C. Its peduncles, or roots. 
D. Base of the peduncles. 
E. Edge of disk. 
F, F'. Peripheral zone of disk (umbrella). 
#H. Kidney-shaped plates (lids of the genital cavities). 
I. Mouth arms. 
R', Four main rays. 
R*, Four intermediate rays. 
R*. Eight rays of lower rank. 
. Center of mouth disk and central mouth rudiment. 
b. Primary arms of the mouth cross. 
. Secondary arms of the same. 
d, e. Isosceles triangles with the mouth cross. 
Jf. Coelenteric central cavity. 
h, Boundary of the kidney-shaped plates (lids of the genital cavities) and in part of the 
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central cavity. . 
. Oval windows (entrances to the genital cavities). 
MON XXX 6 
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