Eu. 
material as themselves, to such an extent that it might be truer to 
speak of the lower surface of the electroplax as being invaginated into 
pockets instead of evaginated into papillae. The lower half of the 
14 
9 zz = — ms = 
10. =e en ik = 
177 6 0 () 
0 | In 
(6) 10) iC) a 
0 me® 0 | ati 
© ‘Ne (0 
A a 
17 
Fig. 6. 
12 
9. te => SS == > 
10> eee = ee © oJ D 
IE 
AUTON MALU 
0) 0) 6 0) 0) 
0 Q P 
(6) | } 
15 ie 
lanes fc 
jaa. 
9. gest = 
a en ne 
117 
Fig. 5, 6, 7 and 8. Camera-outlines of portions of sections of four different elec- 
troplaxes to show the layers etc. and to show by comparison the variations in form of 
the different electroplaxes. In fig. 5 (B) is a greater magnification of the electric layer 
in (A). 9 electric layer, 10 middle layer, 11 nutritive layer, 12 electric nuclei, 73 nutri- 
tive nuclei, 14 rod-like structures, 15 papillae, 16 webs, 17 connectives, 18 striations, 
indicated in a few places. 
