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Show 426 MR. E. A. SMITH ON SHELLS FROM ADEN. [June 16. 210. TELLINA (TELLINELLA) MADAGASCARIENSIS, Gmelin. Hab. Madagascar. 211. TELLINA (TELLINELLA) INFLATA, Chemnitz. Hab. Philippine Islands, China Sea, Mauritius, Red Sea, east coast of Africa, Nicobars, Ceylon, &c.; Port Curtis (Brit. Mus.). 212. TELLINA (ANGULUS?) ADENENSIS. (Plate XXXIII. fig- 8-) Testa planissima, oblonga, antice rotundata, postice acuminata, fere cequilateralis, roseo-cdbida, umbones versus plus minus aurantio tincta, postice radio albo angusto ornata ; valvce nitidce, lineis incrementi concentricis tenuiter striata; (striis marginem posticum validioribus, aliisque ad medium obliquis), intus et extus radiatim substriutce ; mar go dorsi anticus leviter declivis, vix excurvatus, posticus oblique descendens, rectus, cum margine posteriore angulum obtusum formans, ventralis parum arcuatus, postice vix sinuatus; pagina interna alba, superne ante apices aurantio tincta, lira postice radianle instructa ; denies cardinales valvce dextrce tres divergentes, sinistra duo, laterales nulli; sinus pallii maximus, usque cicatricem anticam productus, supra medium valvce angulatus. Longit. 45 millim., alt. 26|, diam. 7. T. armata, Sowerby (Conch. Icon. fig. 264), the type of which is in the British Museum, is somewhat like the present species, especially in colour, but is less acuminate posteriorly and its hinder dorsal margin is not so sloping. Besides the fine concentric lines of growth, T. adenensis exhibits oblique striae upon the front half of the shell, which terminate about the middle of the valves. The striae on the posterior dorsal slope are considerably stronger than anv on the rest of the surface. The raised ridge on the inner surface of the valves, which extends obliquely from the umbones towards the posterior end of the ventral margin, forms the white ray which is so conspicuous ou the outer surface. Of the three teeth in the right valve, the front one is the longest, the central smallest, and the hindmost bifid. In the left valve the posterior tooth is very thin, whilst the other, which falls perpendicular under the apex, is much stronger. 213. TELLINA (ANGULUS?) SUBPALLIDA. (Plate XXXIII. fig- 9.) Testa incequilateralis, oblonga, antice rotundata, postice angus-tata, albida, versus apices interdum jmllide fiavescens, zonis lineis concentricis griseo-hyalinis picta, mediocriter compressa margo dorsi anticus leviter obliquus, subrectilinearis, posticus valde dedivis, ventralis late arcuatus, postice vix sinuatus; valvce lineis incrementi tenuibus concentricis striata;, striisque aliis conspicue obliquis confertis fere undique sculpla?; denies cardinales valvce dextrce duo divergentes, in valva sinistra |