128 



THE ANATOMY OF THE HONEY BEE. 



prosoiits a lioneycoiiil) appearance iiiuler the microscope, and each 

 little hexagonal facet is the outer end of an eye tube called an omnia- 



*# l.ret.n 



H ' 







Fig. 55. — Histological dotails of compound eye of worker (after Phillips) : A. entire 

 ommatidlum (somewhat diagrammatic), adult; B, entire ommatidium, as if dissected 

 out, without outer pigment cells (diagrammatic I, adult; C, section of entii'e om- 

 matidium, showing distribution of pigment, adult ; D, cross section just proximal to 

 lens, slightly oblique ; E, cross section through extreme distal ends of retinuhr and 

 proximal ends of cones, slightly oblique ; F, cross section through retinula', showing 

 relation of outer pigment cells in this region ; G, cross section through retinuire in 

 region of nuclei ; H, cross section through retinulse in region of proximal nucleus ; I, 

 cross section of eye. cutting basement meml)rane parallel (the distinctness of nerve 

 fibers of each ommatidium is shown) : Bil. basement membrane; CC, crystalline cone; 

 CL, crystalline lens; c.-p.c, corneal pigment cell ; he, hair-c(Ml ; l.ret.n., lower retinular 

 nucleus; n.f., nerve fiber; Xr, nerve; o.-p.c. outer pigment cell; rrl . retinula; ict.ii., 

 retinular nucleus; r)tb, rliabdome. 



tidiu///, all of which converge toward the internal base of the eye, 

 since each is vertical to the outer surface. Figure 54 is a horizontal 



