16 BULLETIN: MUSEUM OF COMPARATIVE ZOOLOGY. 
I can confirm his statements as to their position in general; but the 
bodies also occur almost at random in the cell, for in any series of 
sections it may be seen that they may he between the nucleus and 
basal plates, or peripheral to the nucleus, as well as around it. It 
is true that they are found most numerously between the basal plate 
(probably the region of Hesse’s “Stiftchensaum”’) and the nucleus. 
That this statement is correct for the lateral eyes, will be readily seen 
whatever the plane of section, and for the ventral eye in both sagittal 
(Plate 5, Fig. 46; Plate 1, Figs. 2, 3, pha’so.) and transverse (Plate 5, 
Fig. 50) sections. Frontal sections of the ventral eye (Plate 1, Fig. 8) 
show that the interior bodies are more numerous in the region between 
the nucleus and the median plane of the eye, than in the outer por- 
tions. But in any case the interior bodies are found less frequently 
lateral to the nucleus of a cell. This is shown in Figure 8 and ap- 
pears also in all other regions of the eve. 
I have been unable to confirm Hesse’s statement that the rod-like 
bodies which appear to be isolated are sections of a ribbon-like or 
band-like, structure. My belief is that the interior bodies are really 
and only rod-like, or spicule-like, though ribbon-like bands are seen 
occasionally. One of these is shown in the right cell of the uppermost 
pair of Figure 8; but they are so infrequent and the appearance is so 
confused that the conclusion is almost forced upon one that in such 
cases they are so crowded together that their actual structure is not 
seen. It is easy to recognize the interior bodies in entire preparations 
of the eye, and I have never seen a band-like body in any preparations 
of that kind. 
On the other hand, it is possible, if one follows many series, to find 
transitional forms between such closely aggregated groups of spicules 
as appear in Figure 8, and the ribbon-like forms. In Figure 2 (pha’so.) 
are shown several cases where it is plain that the structures which 
appear to be bands are in reality made up of numbers of single rods 
closely gathered together. The bands appear most frequently in 
material either stained deeply in vom Rath’s fluid or very lightly 
in haematoxylin; in the one case the real structure is hidden by excess 
of stain, and in the other it is not brought out. I think that the non- 
appearance of bands in whole preparations almost precludes the 
possibility that these bodies are bands, and there can be no doubt at 
all that interior bodies occur as rods or spicules completely isolated 
from all other structures of the same sort. It must be admitted, 
however, that what seem to be band-like structures really appear in 
the retinal cells, as Hesse (:01) has stated and shown in his figure 
