Side-mounted H. dujardini specimen showing leg muscle anatomy as revealed by phalloidin staining. Anterior is to the right. Scale bar equals 25 μm. (A) Maximum projection of the medial muscles of the left three anterior-most legs. All medial leg muscles extend to ventral median attachment sites. Ventral median attachment sites are numbered 1-7. Right legs are outlined. (B) Maximum projection of the lateral muscles of the left three anterior-most legs. Lateral leg muscles extend to dorsal attachment sites (lower case letters correspond to letter designation of dorsal attachment site) or to lateral attachment sites (muscles labeled t, τ). (C) Maximum projection of the lateral (right leg) and medial (left leg) muscles of the posterior-most legs. Dashed lines in the posterior denotes boundary between legs and body wall. A dashed line also outlines the right third leg. The posterolateral muscle strands of the third leg are labeled (u1, s1). Dorsolaterally directed muscle 8a is labeled. Abbreviations: ga, ganglion; le, leg; sh, sheet muscle; ve, ventral longitudinal muscle strand.