Hughmilleria socialis Sarle Page 335 See plates 59–61, 62–64 1 Pincers of a chelicera. × 3½ 2 Extended chelicera and first two pairs of walking legs. × 3 3 Fragment of first joint and the pincers of a chelicera. × 4 4 Pair of chelicerae, presumably in normal position. × 3 5 The two posterior walking legs in complete preservation. × 3 6 Dorsal view of a large specimen. The anterior portion of the carapace is broken away thereby exposing one extended chelicera and the walking legs of the right side. Both swimming legs are also shown. Natural size 7 Complete walking leg, showing coxal joint and articulation of second joint. × 3½ 8 Complete chelicera in natural position. × 3½ 9 Dorsal view of right side of cephalothorax with the four walking legs in position. × 3 Horizon and locality. Pittsford shale. Pittsford, Monroe co., N. Y.

The originals of all figures are in the State Museum. All specimens are cotypes