DESCRIPTION OF ILLUSTRATIONS, 
197 
FIG. PAGE 
43. Taste organs on tongue. — c, Wolff’s hollows, seen en- 
larged at B 96 
44. Longitudinal section through compound eye. — cornea; 
cc^ crystalline cones; pigment cells; m, basilar 
membrane; opticon; epiopticon ; periopticon ; 
no^ crossing nerve fibrils; mc^ muscle ; /z, hairs 99 
45. Longitudinal section of part of eye. — <r, cornea; cc^ crys- 
talline cones; Semper’s nuclei ; rb^ rhabdia ; r, 
retinulae 100 
46. Cross section of Fig. 45. — r, retinulse; rb^ rhabdia ... 100 
47. Longitudinal section through stomach mouth. — a, hairs; 
b, opening into chyle stomach ; c, membrane ; d, hairs ; 
e, longitudinal muscles; /, horizontal muscles; mus- 
cles of honey sac; b, prolongation; f, nucleated cells; 
ring muscles; /, longitudinal muscles; nucleated 
cells of intima ; lining of honey stomach ; 0, muscles 108 
48. Cross section of stomach mouth. — Lettering as in Fig. 47 108 
49. Section of small intestine. — a, opening; b, nucleated 
cells ; c, muscles iii 
50. Glands. — A, .System I.; <2, opening on hypo-pharyngeal 
plate; b, sac-like hollow; c, ducts; d, papillae; e, hypo- 
pharyngeal plate; /, muscles; acini; B, /z, papillae; 
other lettering as A; C, sieve-like opening; 2, main 
duct; b, cells; nucleus; u, tubes connecting cells 
with main duct ; /, acinus with single cell and nucleus, /; 
1), Systems II. and III.; 0, main duct; p, glands of 
System II. ; r, reservoir; j-, worm-shaped glands of 
System III.; e, intercellular gland of System II.; v, 
propria; x, intima; w, opening into duct; F, gland of 
System III.; a, c, canal; j, outer cell layer; 2;, section 
through cells 114 
51. Gland .System IV. — curved tube; /*, intima; d^ cell 
layer; secretion; jaw; b^ hairs in hollow; out- 
side hairs; muscles 119 
