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Show 794 MR. H. ADAMS ON NEW EXOTIC SHELLS. [Nov. 15, tice subsinuata, intus margaritacea ; columella revolula, acuta; perist. simplex, rectum. PHANETA EVERETTI, H. Ad. (Plate XLVIII.figs. 20, 20«, 20ft.) P. testa depresso-trochiformi, tenuiuscula, albida, epidermide pallide fulva tenui induta; spira convexo-conica, apice obtuso, sublate-rali, sutura distincta ; anfr. 3, convexiusculis, rapide accrescenti-bus, striis obliquis obscuris, et striis nonnullis spiralibus, irregularibus ornatis, ultimo acute carinato, basi subconcavo, regione columellari excavato, concentrice conferte striato. Diam. maj. 8^, min. 7*§, alt. 6 mill. Hab. Siniwan River, Borneo ; attached to submerged logs (coll. H. Ad.). For a knowledge of this very distinct form of fluviatile mollusca we are indebted to Mr. A. Everett, who collected it in the neighbourhood of Sarawak, Borneo. It appears, so far as can be judged from the shell alone, to be allied to the Valvatidae, in which family, therefore, it may be provisionally placed. The two land shells below described were also found by Mr. Everett in the same locality. MACROCHLAMYS CUTTERI, H. Ad. (Plate XLVIII. fig. 21.) M . testa anguste perforata, depressa, tenui, politissima, lucida, vi-renti- cornea, supra medium fascia lata fusco-rubra ornata; spira brevissime conoidea, sutura anguste marginata ; anfr. 5 \, convexiusculis, regulariter accrescentibus, ultimo non descendente, rotundato ; apertura parum obliqua, rotundato-lunari; perist. simplici, recto, marginibus convergentibus, columellari arcuatim descendente, superne breviter reflexo, perforationem semitegente. Diam. maj. 15, min. 13, alt. 9^ mill. Hab. Busan, near Sarawak, Borneo (coll. H. Ad.). ALYCAEUS GLOBOSUS, H. Ad. A. testa perforata, ovato-globosa, tenui, costulis tenuissimis numerosis longitudinaliter ornata, pallide fulva ; spira turbinata, apice obtusiusculo, sutura valde impressa ; anfr. 4\, convexis, ultimo tumido, antice paulum ascendente, 2 mill, pone aperturam constricto, tubulum suturalem brevissimum gerente; apertura subobliqua, circulari ; perist. duplicato ; interno continuo, breviter porrecto externo patente, ad anfr. contiguum interrupta, supra perforationem angulatim producto et valde refiexo, perforationem fere occultante. Diam. maj. 5, min. 3|, alt. 4 mill. Hub. Busan, near Sarawak, Borneo (coll. H. Ad.). Genus HARGRAVESIA, H. Ad. Testa subovata, polita, callo nitido obducta; apertura circulari; perist. simplex, subincrassatum, margine dextro juxta insertionem canaliculato. In this genus, which is in other respects similar to Pupina, the canal in the columellar margin is absent. |