Fia. 
Fig. 
Fig. 
Fia. 
21. 
22. 
23. 
24. 
oxide. The nerve is clearly shown leaving the cell from a point 
on the periphery opposite to the basal plates. The interior 
bodies are arranged in typical fashion. Figure 19 is ventral to 
Figure 20. X 665. 
ie entire eye seen from the ventral side. Vom Rath’s fluid 18 
hours; pyroligneous acid 44 hours; decolorized in hydrogen 
peroxide. The ventral ocellus, the peeidarice between its cells, 
and the nuclei are shown by sharp dark outlines. The prepara- 
tion is slightly distorted by pressure. The typical and general 
arrangement of the interior bodies as described in the text is 
well shown. X485. 
The eye, entire, from the dorsal side. Vom Rath’s fluid following 
formalin. Ten nuclei are shown in the ventral ocellus, nine in 
each of the lateral ocelli. The nuclei which are shown in black 
lie at the highest focus, those with palest tint at deepest focus; 
the nuclei of the ventral ocellus are merely outlined. X 560. 
Cross section of the eye, seen from in front. Zenker’s fluid; iron- 
haemotoxylin. Shows the striation of the basal portion of the 
retinal cells, also the interior bodies, the basal plates and the pig- 
ment cell. X 665. 
Anterior part of brain seen from dorsal side. Vom Rath’s fluid one 
hour; pyroligneous acid one hour; decolorized in hydrogen per- 
oxide. The organs of Claus are shown in position at the front 
lateral margin of the brain, near the antennal nerve. The optic 
nerve is median. X 270. 
