778 
ROBERT PAYNE BIGELOW 
EXPLANATION OF FIGURES 
10 Diagrammatic drawing of a radial section of the margin of Chrysaora, cut- 
ting the rhopalium longitudinally. X 56. The lines I, II, etc., show the planes of 
figs. 3, 4, etc. 
11 A vertical tangential section cutting the rhopalium obliquely so as to show 
the band of nerve fibers running from the rhopalium to the lateral pocket. 
Slightly diagrammatic. X 120. 
12 Radial section through the columnar epithelium at the proximal end of the 
rhopalial ridge. This section happens to contain two nettle cells. X 550. 
13-15 Typical tangential sections through the sensory apparatus of Pelagia 
cyanella, somewhat diagrammatic. X 108. Fig. 13 corresponds to fig. 4 of Chry- 
saora, fig. 14 to a plane between figs. 5 and 6, and fig. 15 approximately to fig. 8. 
16 A radial section of the rhopalial ridge at its proximal end in Pelagia, showing 
a large ganglion cell. X 1120. 
