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Show 274 MR. E. A. SMITH ON THE [Apr. I, That species has, however, rather stronger ribs and distinct spiral striae, which at once separate it from the present species. S. mellissi is of a livid colour, and glossy between the white ribs, which are thirteen or fourteen in number, and are very like those of S. trevelyance, but have not the short projection near the upper end. It may be described as a stumpier species than that shell, the spire being less slender. SCALARIA SANCT.E-HELEN,E. (Plate XXIII. fig. 14.) Testa parva, albida, turrita, gracilis, imperforata ; anfractus primi 3-4 laevigati, nitentes, convexi, pellucidi, cceteri convexi, contigui, lamellis numerosis, (in anfr. ult. 26-28) tenuissimis, paulo obliquis, instructi; apertura subcircularis, inferne obscure effusa. Longit. 4 | millim., diam. 1|. The number of whorls, and their steady enlargement, incline me to believe that this species does not attain a much larger size. It seems to approach S. pulchella, Bivona, but the riblets are finer and" the whorls not quite so high. SCALARIA COMMODA. (Plate XXIII. fig. 15.) Testa parva, angusta, elongata, albida, imperforata; anfractus 9, sutura undulata sejuncti, primi tres convexi, nitidi, rufes-centes, cceteri convexi, costis crassis circa 11, leviter lirisque tenuibus, pluribus, cancellati, incrementi lineis decussati; anfr. ultimus lira crassa inferne cinctus; apertura ovato-circularis, superne quam basi angustior ; labrum valde incrassatum. Longit. 5 millim., diam. 1|. This minute species is well characterized by its reddish apex, the strong ribs extended upward, so as to form a wavy sutural line, and the spiral lirae, producing a cancellated appearance. SCALARIA ATOMUS. (Plate XXIII. fig. 16.) Testa minima, brevis, anguste umbilicata, alba; anfractus 4|, perconvexi, sutura profunda sejuncti, primus Icevis, cceteri tenuibus circiter 18 instructi; apertura oblique ovata, paulo subeffusa ; peristoma in exemplis adultis continuum, margine columellari subrefiexo. Longit. lg millim., diam. 1. The shells here described, although so small, appear to be full-grown ; such may not, however, be the case. SCALARIA MULTISTRIATA, Say ? S. multistriata, Say, Amer. Conch, pi. 27 ; Sowerby, Thes. Conch. vol. i. p. 108, woodcut; Gould, Invert. Mass. 1870, p. 313, cut. Hub. U. States, W . Indies, Mediterranean. A single specimen from St. Helena and one from the Canary Islands, in the Museum, apparently belong to this species. They are a trifle narrower in the body-whorl than the above-cited figures. |