100 JAMES G. HUGHES, JR. 
Fig. 2 Horizontal section through an electroplax. Only the electric layer 
is seen; a, an extensively branching rod; b, fine branches of the above rod; c, 
a large characteristic loop in a rod; d, acut end of a rod; e, nuclei of the electric 
layer. XX 1200. 
stained with iron hematoxylin. These drawings show the 
electric layer in which the rods are found in horizontal section 
(fig. 2) and in vertical section (fig. 1). 
The purpose, function, and chemical composition of these 
rods have been previously unknown to histologists. In order to 
determine anything in respect to their function or purpose, a 
knowledge as to the class of organic substance to which they 
belong, whether muscle, connective tissue, nervous, or chitinous, 
