844 
number of so-called electric platelets disposed in rows running 
parallel to the axis of the body. Each platelet (see fig. 1) consists 
of 1. a so-called anterior cortical layer composed of a single layer 
of cells; 2. an inner layer composed of numerous twisted lamellae 
medullated nerve 
posterior cortical layer 
jelly-like 
nonmedullated connective 
nerve branchlets tissue 
inner layer 
anterior cortical layer 
= 
EN 
Pe 
nonmedullated 
| nerve-fibre 
posterior / B 
cortical layer j anterior 
lamellae cortical layer 
of inner layer 
Fig. 1. A. Sagittal section through electric organ of thorn-back. 
(only two electric platelets have been represented). 
B. Part of an electric platelet, more enlarged. 
(Diagrams, made after picture of frozen sections). 
