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Show 1891] MR. E. A. SMITH O N SHELLS FROM ADEN. 417 145. CERITHIUM COLUMNA, Sowerby. Hab. Red Sea, Indian Ocean, Philippines, Australia, Samoa, Fiji, &c. 146. CERITHIUM TUBERCULATUM (Linn.). Hab. Red Sea, Indian Ocean, Philippines, Polynesia. For remarks on this and allied species see Report on the 'Alert' Collections, pp. 63, 64. 147. CERITHIUM YERBURYI. (Plate XXXIII. fig. 4.) Testa elongata, acuminata, alba, lineis transversis nigris interruptis ornata; anfract. 10, convexiusculi, costis longitudinalibus anfr. penult. 9, in ultimo tenuioribus circiter 12) lirisque (anfr. superioribus 3, in ult. 7-8 aliisque minoribus inter-calentibus) instructi; apertura obliqua, longit. totius 3 superans labrum extus incrassatum, intus album, leviter liratum ; columella oblique arcuata ; canalis brevis, obliquus. Longit. 19, diam. 7 millim. In this species a few of the costae (about two on each whorl) are more conspicuous than the rest, and one on the left side of the body-whorl which interiorly runs into the cauda forms a boundary to it. Between this and the labrum the costae are finer than upon the preceding whorl. The interrupted black lines fall upon the spiral ridges, which on crossing the ribs form more or less acute tubercles. In the interstices between them there are fine parallel striee. C. torresi, Smith, is closely allied to this species, but more slender, and differs in detail of sculpture. 148. TURRITELLA MACULATA, Reeve. Hab. China Sea. The brown thread-like lines which cover the surface are more distinct in the specimens from Aden than in those from the China Sea. 149. TURRITELLA COLUMNARIS, Kiener. Hab. Ceylon (Reeve) ; Mergui (Martens). The whorls in the specimen figured by Reeve (Conch. Icon. f. 14) are unusually flat. Most examples more nearly resemble Kiener's figure of this species. The granulation of the transverse strise mentioned by Kiener is very feeble, and can hardly be said to exist in the specimens I have examined. Two specimens from Aden are remarkably short and broad in proportion, so that at first I was inclined to regard them as a distinct species. Their colour and sculpture being the same as the typical form, I now regard them merely as a different growth of the same species. 150. MITRULARIA CICATRICOSA (Reeve). Calyptrcea cicatricosa, Reeve, Con. Icon. f. 3 a-b. Hab. Philippine Islands (Cuming). |