Marshall—On the Anatomy of the Dragonfly. 789 
PLATE LXX. 
Fig. 34. Section through an acinus of the salivary gland. X 1700. 
cd. collecting duct. 
Fig. 35. Reservoirs of salivary glands—above a part of the large ducts 
leading from the glands, below the two short ducts and the com¬ 
mon one into which they unite. X 50. 
Fig. 36. Surface view showing a few cells, inner surface, of the sali- 
vary^ gland reservoir. X 875. This view shows the free ends 
only of the protruding portions of the cells. Compare figure 37. 
Fig. 37. Section showing two cells of the wall of the reservoir. 
X 1100. The heavy cuticula lines the inner surface, s, position 
of small dark objects which might have to do with outlet of se¬ 
cretion. 
Fig. 38. Opening of common duct, sd, from reservoir of salivary glands 
on surface of the hypopharynx at x. Combined from two sec¬ 
tions. X 280. 
Fig. 39. Dissection to show the male reproductive organs. Part of 
the alimentary canal removed. T, testis; Yd. vas deferens; 
Vc. Sem. vesicula seminalis. 
Fig. 40. Dorsal view showing proximal part of vasa defferentia, Vd., 
and the seminal vesicle, Vc. Sem. X 30. The common opening 
ventral, is shown by dotted lines near the posterior part of the 
vesicles, at X. 
Fig. 41. Longitudinal section of a small proximal part of a testis, 
T, and the vas deferens which passes out of it. X 105. The two 
layers of the wall of the vas deferens, the epithelial, Epth. and 
the fat, Ft. both shown. The central core or mass of cells inside 
the vas deferens is shown at Co. None of the strands of con¬ 
necting epithelial cells were shown in this section. 
Fig. 42. Transverse section of the vas deferens. The epithelial layer 
of the wall, Epth., and the central core of epithelial cells are 
stippled. The thick irregular black part shows a mass of sperms. 
Ft., layer of fat cells. 
Fig. 43. Transverse section of the wall of the vas deferens showing the 
epithelial layer, Epth. and the outer layer of fat cells, Ft. X 
1100. 
Fig. 44. Section of the wall of the seminal vesicle. X 1100. 
Fig. 45. Transver’se section through the wall of the seminal vesicle 
showing its outlet to exterior between the valves, vl. X 105. 
At X the bracket limits the moveable chitinous flap which, with 
the one on the other side, close over the opening of the male 
reproductive organs. 
Fig. 46. Single ovarian tubule—part of terminal filament omitted. 
X 50. 
Fig. 47. Partly diagrammatic dorsal view of the female reproductive 
organs—ovaries and most of oviducts not drawn. X 50. The 
proximal ends of the oviducts, Odt., are shown. The passageway 
leading from the bursa copuiatrix, Br. C., to the seminal re- 
cepticle, Rp. Sem., is shown and part, p, of it is seen to have on 
its walls the cuticular processes shown in figure 52. This pass¬ 
ageway, P, passes under the cuticular collar appearing in the 
drawing to pass through it. The vagina has been in part cut 
open to show the large folds in its wall. The cuticular collar 
is shown at Cu. Co 
