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MARINE MOLLUSCA. 605is white, blotched with dark chestnut. The lower part of the body-whorl is minutely white-dotted.Intermediate forms connecting this with the type occur in the British Museum collection. Length,17 mm., diam. 7 mm.77. Mitra (Costellaria) exasperata, Gmelin, 40, 6, /F. (var. = v¥. arenosa, Lamarck, 40, i, IV.)VII, VIII, IX, X, XII, XIV, XV.The two specimens from station XIV. are variations of the form arenosa, differing from normalexamples in being almost entirely white, with only one or two fiiiut zones below the middle ofthebody-whorl.78. Mitra (Costellaria) sculptilis. Reeve, 37, //. II, V, X.79. Mitra (Costellaria) acupicta. Reeve, 4:0, b, IV. V.80. Mitra (Costellaria) armigera. Reeve, var. 37,11. IX.A single specimen only of this species was obtained. It differs from the type in being whiter,with a thread-like brown line round the middle of the upper whorls and three on the last. Thelocality of the type is unknown. M. turrigera, Reeve, is closely allied, but more sculpturedbetween the costae.81. Mitra (Costellaria) deshayesii, Reeve, 40, b, IV. X.82. Mitra (Costellaria) angustissima, n. sp. (PL XXXV. fig. 5). V.Testa gracillima, elongato-fusiformis, pallide fuscescens, ad partem anfractuum superiorem albida,fusco maculata, et circa medium anfr. ultimi maculis subquadratis notata ; aiifractus circiter 10,superiores subgradati, fere plani, caeteri leviter convexiusculi, costis numerosis (circiter 28) gracilibusinstructi, et sulcis spiralibus inter costas punctatis (in anfr. penult. 7, in ultimo 12—13) sculpti,ultimas antice circa caudam sulcis obliquis fortioribus baud punctatis ornatus ;apertui-a parva, angustalongit. totius J paulo superans ;columella plicis quinque obliquis instructa, callo tenui induta ; labrumtenue. Longit. 12^ mm., diam. 4. Apertura 5 longa, 1^ lata.Remarkable for its very slender form and the punctate striae between the costellae. The foldson the columella correspond to the oblique ridges between the sulci on the cauda of the bodywhorl.These ridges are spotted with pale brown.83. Cylindra sinensis. Reeve, 40, 6,/ F. VI.Family FASCIOLARIIDAE.84. Latirus craticulatus, Linn. (TurbineUa craticulata. Reeve, 37, IV.) IX.85. Latirus fastigium. Reeve {TicrbincUa fastigium, Reeve, 37, IV.) XII.86. Peristernia nassatula, Lamarck (TurbineUa nassatula, Reeve, 37, IV.) IX.87. Leucozonia smaragdula, Liim. (TurbineUa smaragdula. Reeve, 37, IV.) IX, XI, XIII.Family TURBINELLIDAE.88. Cynodonta cornigera, Lamarck (TurbineUa cornigera, Reeve, 37, IV.) Maldives.G. II. 78