PARKER. — Compound Eyes in Crustaceans. 
Fig. 
“ 
PLATE I. 
Gammarus. 
A section of the right eye in a plane transverse to the chief axis of the 
body and through the central part of the retina. X 115. 
A section lengthwise of an ommatidium. The numbers at the left of 
the figure correspond to the numbers of the six following figures 
of transverse sections, and mark the levels at which the latter were 
taken.  X 475. 
A transverse section in the plane of the corneal hypodermis. 475. 
A transverse section through the distal ends of the retinular cells and 
cone. X 475. 
A transverse section through the proximal portion of the cone and 
through the adjoining retinular cells. > 475. 
A transverse section through the retinula in the region of the rhabdome. 
x 475. 
A transverse section through the retinular cells somewhat proximal to 
the basement membrane. \X 475. 
A transverse section through a single retinular celi in the region of its 
nucleus. X 475. 
The proximal portion of a retinular cell viewed from the side. (Compare 
Fig. 2.) Isolated in Miiller’s fluid. Notstained. > 475. 
A cone isolated in Miiller’s fluid and viewed from the side. Not stained. 
<x ATH. 
