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Show 308 MR. H. ADAMS ON NEW SHELLS. [ Mar. 14, anfr. 7, convexiusculis, ultimo g longitudinis vix eequante, rotundato ; apertura verticali, semiovali; perist. recto, columellari subverticali, superne dilatato, patente. Long. 5, diam. 2 mill. LLab. Matelle, Ceylon (Coll. F. Layard). This small species was collected by Mr. Frederick Layard at Matelle, Ceylon, and is peculiar from being, at least so far as I know, the only sinistral land-shell that has yet been met with in the island. APICALIA SCITULA, II. Ad. (Pl. XIX. fig. 18.) A. testa subulata, solidiuscula, subpellucida, politissima, fascia suturali subdiaphana ornata ; spira attenuata, sutura indistincta ; anfr. 12, apicalibus 3 stilinis, deinde planiusculis, ultimo rotundato; apertura subovali; labio incrassato, tenui, calloso ; labro valde sinuato, vix incrassato. Long. 10, diam. 3^ mill. ; ap. 3 mill, longa. Hab. Borneo (Coll. 77. Adams). COLINA PYGMAEA, H. Ad. (Pl. XIX. fig. 19.) C. testa pupiformi, tenuiuscula, fiavida, strigis fulvis nonnullis ornata ; spira medio inflata, sursum convexo-turrita, apice tusiuscula; anfr. 7, convexiusculis, longitudinaliter nodoso-plicatis et transverse leviter striatis; plicis longitudinalibus in anfractu ultimo fere obsoletis, striis transversis, ad suturas moniliformibus, et fusco lineatis; anfractu ultimo -f longitudinis eequante, contracto, et in medio subangulato; apertura semiovali, canali brevi recurvo; columella obliqua, arcuata, oblique striata, vix callosa ; labro valde expanso, extrorsum incrassato. Long. 10, diam. 3 mill. Hab. Borneo (Coll. H. Adams). This species is another interesting addition to the small genus Colina. The species I lately described as C. gracilis I find has been since described by Mr. G. B. Sowerby under the name of C. coarctata. Genus PARMELLA, IL Ad. Testa haliotidea, tenuissima, epidermide cornea, extra testam producta ; spira plana, vertice laterali; anfr. paucis, ultimo maximo ; apertura ampla. This peculiar form is probably closely allied to Parmacella; but the shell of the latter is shown in Cuvier's figure of the typical species (P. olivieri) to have a posterior, terminal and rather prominent apex. It is also somewhat similar to the South American genus Peltella, Beck (Gceotis, Shuttl.), but differs in being more depressed, and in the horny polished epidermis with which it is furnished extending widely beyond the posterior part of the margin. PARMELLA PLANATA, H. Ad. (Pl. XIX. fig. 20.) P. testa depressissima, haliotidiformi, tenuissima, epidermide |