E. W. BERGER ON THE CUBOMEDUSZ. 51 
(Fig. 2). Distally, the pigmented part becomes narrowed to a strong 
pigmentless fiber (Figs. 3, 4, 7). This fiber stains quite dark with 
iron-hematoxylin and appears homogeneous. It passes between the 
prisms into the capsule, where it usually bends in a direction toward 
the margin of the capsule (Fig. 7) and passes diagonally across this 
to the lens. In sections, a space is often seen about these fibers in the 
vitreous body, which I regard as a shrinkage space (Figs. 3, 4), since 
it is not evident in all series (Fig. 1). In Fig. 7, I have assumed that 
these spaces are due to shrinkage and have not indicated them. Also, 
in this same figure I have assumed that the spiral appearance of the 
fibers (Fig. 4) is due to a shortening of the prisms during fixation, 
and have drawn them straight. At the lens these fibers seem to 
end. In a few instances they were seen to branch upon reaching 
the capsule (Fig. 4). In Fig. 9, also, which shows some of these cells 
from a macerated preparation by Conant, the rods show evidence of 
branching at their distal terminations. In the same preparation I 
thought I could see that a fiber became expanded into a membrane 
spreading over one of the lens-cells. I could not satisfy myself, 
however, that this was the actual condition of things. Judging from 
Fig. 9, one might conclude that all the fibers are branched distally ; 
yet, if such were the case I should have seen more of it in sections, 
but branching as seén in Fig. 4 is the exception. Hence, if all these 
fibers do branch, I am inclined to believe that it must be among the 
bases of the lens-cells. Or, if the fibers do expand into membranes to 
cover the lens-cells (I could not explain purpose), the evidence in 
Fig. 9 may be nothing more than fragments of this membrane left 
attached to the ends of the fibers. As is seen in Fig. 7, most of these 
rods end opposite the cells of the lens, and not usually between two 
adjacent cells as Schewiakoff has described for Charybdea marsupialis. 
The nuclei of these cells are like the nuclei of the pyramid cells (Figs. 
4, 5, 7, 9) and often have a nucleolus.* Centrad these cells are 
continued into a number of processes as is seen in Figs. 5, 7 and 9. 
How far the several centrad processes extend and where they end I 
cannot say; but, as seen in Fig. 5, they soon taper to a thin end 
which I suppose may be continuous with a nerve fiber. I believe 
Schewiakoff was mistaken when he stated that these cells extend to 
the basement membrane. 
*I have been able to demonstrate nucleoli in all the different nuclei of the 
cells of the sensory clubs, 
