L. E. Robinson and J. Davidson 
253 
EXPLANATION OF PLATES XIV TO XVII. 
PLATE XIV. Argas persiczts. 
Dissection of young female, from the dorsal surface. The left-hand half of the figure 
represents the internal organs as they appear after the removal of the dorsal integu¬ 
ment. On the right-hand aide, the stomach and alimentary coeca have been removed 
to display the more deepl 3 '-placed structures. Magn. 25 diam. 
PLATE XV. Argas ])er$icus. 
Median longitudinal section of the body of the male, anterior to the anus (slightly 
schematised). Magn. 40 diam. 
PLATE XVI. Argas persicus. 
A series of six transverse sections of the body of the male. Magn. 45 diam. 
Fig. 1. Transverse section at the level of the middle of the basis capituli. 
Fig. 2. Transverse section at the level of the genital aperture. 
Fig. 3. Transverse section at the level of the anterior bifurcation of the stomacli. 
Fig. 4. Transverse section at the level of the junction of the oesoidiagus with the 
stomach. 
Fig. 5. Transverse section at the level of the spiracles. 
Fig. 6. Transverse section at the level of the anus. 
PLATE XVII. Argas jpersicus. 
Fig. 1. Female; vertical section of a portion of the integument from the ventro-lateral 
part of the body. Carnoy’s Fluid, Thionin-Eosin. (Owing to an accidental precipi¬ 
tation in the tissues, the eanaliculi, which run from the inner surface towards the 
outer surface of the cuticle, are very beairtifully demonstrated in this preparation.) 
X 600 diam. 
Fig. 2. Female ; vertical section of a portion of the stomach wall. Carnoy’s Fluid, 
Thionin-Eosin. x 600 diam. 
Fig. 3. Male ; portion of wall of stomach, flat preparation for demonstration of muscle- 
fibres in outer sheath. (The fresh tissue was spread out flat on a glass slip; fixed 
with Carnoy’s Fluid, and after removal of a considerable portion of the epidermis b}' 
the gentle application of a fine camel-hair brush, the preparation was stained with 
Ehrlich’s “Triacid” mixture.) x 180 diam. 
Fig. 4. Male; transverse section passing through anal canal and anus. Carnoy’s Fluid, 
Thionin-Eosin. x 350 diam. 
Fig. 5. Female; salivary gland, alveolus of first type (granule-secreting). Flemming’s 
Fluid, Heidenhain’s Iron-alum-Haematoxylin. x -500 diam. 
Fig. 6. Female; salivary gland, alveolus of second type (the Pyramideiizellen of Samson). 
Preparation as in previous example, x 500 diam. 
Fig. 7. Male; transverse section of Malpighian tubule. Carnoy’s Fluid, Thionin-Eosin. 
X 320 diam. 
Fig. 8. Female ; longitudinal section through heart, a short distance from the median 
line. Carnoy’s Fluid, Ehrlich’s Haematoxylin-Eosin. x 350 diam. 
Fig. 9. Female; two alveoli and portion of duct of coxal gland. Carnoy’s Fluid, 
Thionin-Eosin. x 600 diam. 
