Foregut musculature indicated by arrowheads, etc. foregut musculature indicated by arrowheads. a, accessory neuropil; ad, caudal adhesion area; b, basalmembrane; em, circular musculature; e, epidermis; g, cephalic glands; i, intestine, 1m,longitudinal muscles; m, main neuropil; mb, precerebral muscle bundles; rd, rhynchodaeum; sg, stomach gland cells, st, stomach.