OCR Text |
Show 1870.] MR. H. ADAMS ON CHINESE SHELLS. 377 5. Descriptions of Ten New Species of Land and Freshwater Shells collected by Robert Swinhoe, Esq., in China and Formosa. By H E N R Y ADAMS, F.L.S. (Plate XXVII.) 1. HELIX (PLECTOTROPIS) CHRISTINA, H. Ad. (Plate XXVII. figs. 4, 4a.) H. testa late et profunde umbilicata, sinistrorsa, tenui, subdiscoidea, oblique irregulariter plicato-striata, sub lente minutissime granulata, albida, supra strigis diffusis fulvis ornata, ad peripheriam albo fasciata, infra fulvo cingulata; spira subplanata, sutura mediocriter impressa; anfr. 6, convexiusculis, lente accrescentibus, ultimo antice breviter descendente, angulato, basi convexiore ; umbilico conico, anfractus usque ad apicem exhibente, intus fulvo ; apertura obliqua, lunari, margine dextro expansiusculo, basali incrassato, expanso. Diam. maj. 25, min. 22, alt. 12 mill. Var. carinifera. Minor, anfractu ultimo acute carinato; umbilico minore. Hab. Ichang and Fungsiang gorges, China. 2. HELIX (PLECTOTROPIS) MARIELLA, H. Ad. (Plate XXVII. fig. 5.) H. testa aperte umbilicata, depresso-lenticulari, tenui, subarcuatim irregulariter rugose striata et sub lente minutissime granulata, pallide fulva; spira paulum convexa, sutura marginata; anfr.4\, ultimo breviter descendente, carinato, carina acuta, compressa, albida, basi convexiore; umbilico mediocri, profundo; apertura perobliqua, angulato-ovali; perist. expanso, albido, marginibus proximis, callo arcuato tenui junctis, basali vix incrassato. Diam. maj. 18, min. 16, alt. 7\ mill. Var. aquila. Minor, fulva; spira elatiore, anfractu ultimo minus convexo. Hab. Ichang and Fungsiang gorges, China. 3. HELIX (ACUSTA) BREVISPIRA, H. Ad. (Plate XXVII. fig. 6.) H. testa anguste umbilicata, depresso-orbiculata, pertenui, fragili, fulvo-cornea, pellucida, oblique striata; spira brevi, apice obtuso, sutura impressa; anfr. 5, subplanatis, ultimo antice non descendente, carinato, subtus tumido; apertura lunari, margine dextro et basali vix expanso, columellari dilatato, refiexo, umbilicum semi-tegente. Diam. maj. 17, min. 15, alt. 11 mill. Hab. Ichang gorge, China. 4. HELIX (ACUSTA) NORA, H. Ad. (Plate XXVII. fig. 7.) H. testa perforata, depresso-globosa, tenui, rugose striata, fulvida |