. Mollusca ... Mollusks. PLECTOPTLIS. 96 Plectopylis munijmrensis, Pilsbry, Man. Conch, ser. 2, ix, 1894, p. 146; Gude, Science Gossip, n. s. iv, 1898, p. 263, fig. 69 (shell and armature). Plectopylis [Chersaecia) munipuremis, Gude, op. cit. vi, 1899, p. 148. Original description.—" Shell dextral, openly umbilicated, tumidly discoid, thick, pale ochry-brown, with distant spots of colour on the upper surface. Umbilicus open and deep. Spire very depressedly conoid, suture shallow. "Whorls 7, flat, the last narrowly constricted just belaind the aperture and descending very slightly. At
. Mollusca ... Mollusks. PLECTOPTLIS. 96 Plectopylis munijmrensis, Pilsbry, Man. Conch, ser. 2, ix, 1894, p. 146; Gude, Science Gossip, n. s. iv, 1898, p. 263, fig. 69 (shell and armature). Plectopylis [Chersaecia) munipuremis, Gude, op. cit. vi, 1899, p. 148. Original description.—" Shell dextral, openly umbilicated, tumidly discoid, thick, pale ochry-brown, with distant spots of colour on the upper surface. Umbilicus open and deep. Spire very depressedly conoid, suture shallow. "Whorls 7, flat, the last narrowly constricted just belaind the aperture and descending very slightly. At the upper and outer margin of the aperture is a slight compression giving a vpaved outline to the lip. Aperture very oblique, semicircular ; peristome slightly reflected, white, a low narrow, curvilinear ridge joining the margins. The parietal vertical lamina is situated one-third of the circumference from the mouth, having an attached anterior short horizontal process equal to its length ; short supports on the posterior. Fig. 41.—Plectopylis munipuremis. extremity and curving slightly forwards on the lower. Palatal teeth 7, the first and upper minute, the second, third, fourth, and fifth horizontal, the second being the longest, sixth minute, seventh rather lengthened, horizontal, backed by a single isolated small ; {Oodwin-Austen.) Major diam. IO'5-II, minor 9-9-5 mm. ; alt. 5 mm. Hah. Burma: Ihang Valley, Munipur (G^oAwn-ylustoi). The parietal armature consists of a single, strong, vertical plate, which is obliquely deflected towards the aperture ; it has two slight supports posteriorly—the lower a little deflected, the upper obliquely raised—and gives ofE anteriorly, at the upper extremity, a long, slightly raised ridge ; a minute denticle occurs just below the vertical plate (see fig. 41rf, which gives an enlarged view of the shell with a portion of the outer wall removed). The palatal armature consists of six more or less horizontal folds : the first
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