1975] Hermann , Baer & Barlin — Venom Gland System 
71 
Fig. 2. Sections through the venom components of Camponotus penn- 
sylvanicus. A — Oblique section, showing periodic transverse muscle in the 
basal region of the venom sac. B — Transverse section, showing the reser- 
voir and convoluted gland. C — Horizontal section, showing filament and 
point of attachment on the convoluted gland. D — Horizontal section 
through the convoluted gland, showing the arrangement of polygonal cells 
along collection ducts. E — Transverse section through convoluted gland, 
showing a well-defined 1 cortex and medulla. The large ducts adjacent to 
the venom reservoir are filled with venom. CG, Convoluted gland. Cor, 
Cortex of convoluted gland. CV, Collected venom. FG, Filamentous gland. 
Jnct, Junction between filamentous gland and convoluted gland. Lu, Lumen 
of filamentous gland. Med, Medulla of convoluted gland. Mus, Muscles 
transversely arranged around venom sac base. RW, Reservoir wall. VR, 
Venom reservoir. 
