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Show 414 MR. E. A. SMITH ON SHELLS FROM ADEN. [June 16, monographs of this genus. The series from Aden includes small specimens, such as figured by Philippi, and others as large as that figured by Reeve in the * Conchologia Iconica' (fig. 63). The minute dotting varies in depth of colour and size, but all examples exhibit the characteristic brown mark below the umbilicus. 105. NATICA TJENIATA, Menke. Hab. Philippines, Japan, China, Java ; Assab (Caramagna). The operculum of this species has only recently been described1. It is strong and shelly, spirally grooved and ridged, the central portion being more elevated than the rest of the surface, and the inner edge, or that which applies to the columella of the shell, is not straight but excurved at the middle. 106. NATICA RUFA, var. Hab. Type from Mauritius; Madagascar, Singapore; Borneo (Brit. Mus.). The Aden specimens belong to the variety (N.forskalii, Chemnitz) which has been quoted from Mauritius (Tryon) and the Red Sea (Issel). 107. NATICA MAROCCANA (Chemnitz). Hab. W . Indies, W . and E. Africa, Red Sea, Indian Ocean, West coast of America, &c. 108. NATICA (NEVERITA) DIDYMA (Bolten2). Hab. Indian Ocean, N. Australia to Japan, E. Australia. Aden (Caramagna as N. chemnitzi). 109. NATICA (MAMILLA) MELANOSTOMA, Lamarck. Hab. Red Sea, Indian Ocean, some parts of the Pacific. Aden ( Caramagna). 110. NATICA (POLINICES) MAMILLA (Linn.). Hab. Same as N. melanostoma ; Aden (Caramagna). 111. NATICA (NATICINA) PAPILLA (Gmelin). Hab. Red Sea, Indian Ocean, Moluccas. 112. SlGARETUS PLANULATUS, Reduz. Hab. E. Africa, Indian Ocean. 113. IANTHINA TROCHOIDEA, Reeve. The specimens from Aden correspond exactly in form with Reeve's figure. 114. RECLUZIA ROLLANDIANA, Petit. The two specimens from Aden, and one in the Museum from 1 P. Z. S. 1890, p. 270, pi. xxi. f. 15. 2 Vide Watson, ' Eeport Challenger Gasteropoda,' p. 450. |