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Show 404 MR. E. A. SMITH ON SHELLS FROM ADEN. [June 16, spots of a brownish tint. The extremity of the canal is stained a darker tint. The upper part of the whorl is divided off by an impressed line forming an infra-sutural convex band which is more or less nodose. This is an extremely rare species, the type in the British Museum being the only specimen previously recorded, and a single example only was obtained by Major Yerbury. 30. PLEUROTOMA (DRILLIA?) VIRGINIA, Beck. Hab. Mouth of the Gambia (Reeve). In the British Museum are four specimens from Bombay, presented by W . T. Blanford, Esq., which agree precisely with Reeve's figure and description. PL tuberculata, Gray, very closely resembles this species, but the canal appears slightly longer. Tryon1, in carrying out his system of " lumping," unites with Clavatula muricata this and several other species, which in m y opinion should be kept separate. 31. PLEUROTOMA (DRILLIA) BAYNHAMI. (Plate XXXIII. fig.2.) Testa fusifor mis, turrita, dilute flavo-fuscescens, pone costasfusco tincta; anfractus 12, primi duo Iceves, globosi, subpellucidi, cceteri supra medium concavi, inferne convexi, infra suturam marginati, costis longitudinalibus supra medium evanidis (anfr act. penultimo 9-10) instructi, lirisque spiralibus tenuibus albis ornati; anfr. ultimus inferne angustatus, pone labrum varice magno convexo instructus, costis inferne attenuatis fiexuosis ornatus; apertura longit. totius |- fere cequans, intus livida; columella vix arcuata, callo tenui superne tuberculo parvo munito induta ; sinus haud profundus, mediocriter latus. Longit. 29 millim., diam. 9 ; apertura 11^ longa, 3^ lata. Like Drillia suturalis, Gray, this species has a raised fillet at the suture ; but it may be distinguished by its shorter body-whorl, its more pronounced costae, and the difference of colour. The costae become obsolete a little above the middle of the whorls where the concavity commences, and, being traversed by a distinct white spiral thread, have a somewhat angulated appearance. 32. MUREX SCOLOPAX, Dillwyn. Hab. Red Sea, Persian Gulf; Aden (Caramagna). Tryon has united with this species M. occa, Sowerby, and M. macgillivrayi, Dohrn, two forms which in my opinion are very different. 33. MUREX TERNISPINA, Lamarck. Hab. Red Sea, Indian Ocean, China, Philippines, Japan. 1 am inclined to believe with Tryon that M. aduncospinosus is the same as this species, but I think M. martinianus and M. troscheli should be kept distinct. 1 Man. Conch, vol. vi. p. 229. |
