128 



THE ANATOMY OP THE HONEY BEE. 



presents a honeycomb appearance under the microscope, and each 

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



CL 



hCC 



o.-p.c. 

 c-p.c. 



rhb. 

 tret. 



[ -retn. 



a.-p.c. 



Nv 



-BM 



Fig. 55. — Histological details of compound eye of worker (after Pliillips) : A, entire 

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

 out, without outer pigment cells (diagrammatic), adult; C, section of entire om- 

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

 lens, slightly oblique ; B, cross section through extreme distal ends of retinulaj and 

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

 relation of out^r pigment cells in this region ; G, cross section through retinulae in 

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

 cross section of eye, cutting basement membrane parallel (the distinctness of nerve 

 fibers of each ommatidium is shown) ; BU, basement membrane; VG. crystalline cone; 

 CL, crystalline lens ; c.-p.c, corneal pigment cell ; li.c._, hair-cell ; l.ret.n., lower retinular 

 nucleus ; n.f., nerve fiber ; A^e, nerve ; o.-p.c, outer pigment cell ; rei, retinula ; ret.n.^ 

 retinular nucleus ; rhb, rhabdome. 



tidium, all of which converge toward the internal base of the eye, 

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



