398 
A very unusual feature of the striation is that it extends throughout 
the cytoplasm of the electroplax. It is, perhaps, a little stronger in 
the papillae and in the middle layer than in the electric layer but it 
is plain and indubitable. at all 
points and is everywhere the 
same structure. It did not 
show any change of width or 
arrangement even when it 
passed through the looser 
middle layer. The striae 
usually terminate, at the sur- 
face, and at right angles to 
that surface. 
The electric connective 
tissue differs somewhat from 
that of others fishes but was 
in such poor condition that 
nothing could be definitely 
Fig. late Horizontal section of the layer determined concerning it. Ner- 
Me comnestive tiswe lying between ine yes and. Dlood-vessels ramify 
of the papillae, and the lymphatic spaces. through its middle region and 
20 Blood capilliary. Numerals indicate the . ; : 
same as in the preceding figures. in its upper portion were 
noticed peculiar channels that 
were taken to be a system ef lymphatics whose office is to bring 
the fluids of the blood into intimate contact with the papillae on 
the lower or nutritive surface of the electroplax (Fig. 9 and 11, 129). 
The heavier strands and plates of connective tissue that form the 
protective cavity for the electroplax in some other forms is apparently 
absent from Astroscopus. 
Part II. Topographical Anatomy of the Electric Organs. 
By C. F. SıLvester. 
With Figs. 12 and 13. 
It is the purpose of part two of the present paper to state as 
briefly as possible the position of the electric organ and its relation 
to the structures immediately associated with it. 
The following description is based almost entirely on a single 
alcoholic specimen of Astroscopus y-graecum. The specimen of Astro- 
scopus guttatus was carefully dissected, however, in order to verify 
and clear up certain points which could not be determined with cer- 
tainty in A. y-graecum. With the exception that the electric organ 
