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Show 396 DR. G W Y N JEFFREYS ON THE MOLLUSCA OF [June 19, and the whorls more convex, the aperture ovate instead of roundish-ovate." He called the striae longitudinal, as being in the direction of the spire. 6. Fusus DELICATUS1, Jeffreys. (Plate XLIV. figs. 6,6 a, 6 b.) S H E L L differing from F. sabini in the following respects :-It is smaller, more slender and cylindrical, and regularly tapering ; the spiral striae are much finer and more numerous ; the epidermis is filmy and of a paler colour ; the whorls gradually increase in size, and the last whorl is not so large in proportion to the others ; the canal is shorter and considerably narrower ; the operculum is ear-shaped and marked not only with close-set lines of growth but with a few oblique striae in the opposite direction. L. 1*25, B. 05. Several specimens from Stations 8 and 9, 608 and 640 fathoms; but they were mostly inhabited by a species of Sipunculus. Also from 540 fathoms in the ' Knight Errant' cruise, and erroneously named in m y list of the Mollusca " Fusus turritus." 7. Fusus HIRSUTUS2, Jeffreys. (Plate XLIV. figs. 7, 7a.) S H E L L turreted, rather solid, opaque, and of a dull hue : sculpture, numerous fine and sharp spiral striae, which are alternately but irregularly larger and smaller ; they extend to the end of the canal; there are about 50 on the body-whorl, 20 on the penultimate, and 12 to 15 on the next whorl; besides these the surface is covered with minute and close-set longitudinal striae, which produce by their intersection a decussation on the upper whorls: colour under the epidermis chalky-white : epidermis brownish-yellow, pilose, each of the spiral striae being thickly clothed with countless short bristly hairs : spire long, tapering to a blunt point; apex regular, button-shaped : whorls 7-8, tumid, gradually enlarging ; the last occupies about two thirds of the shell with the mouth upwards : suture excavated : mouth large, pear-shaped, inflected above; length (including the canal) nearly half that of the shell: canal short, very wide and open, turning to the left: outer lip curved and thin : inner lip broad and polished: pillar flexuous as in other species : operculum triangular, strong, light horn-colour, marked with fibrous and corrugated but irregular lines of growth ; nucleus as in congeners. L. 2*25, B. 0*9. A single but perfect specimen from Station 9, 608 fathoms. Professor Torell dredged this species at Spitzbergen. 8. Fusus CONCINNUS3, Jeffreys. (Plate XLIV. figs. 8, 8 a.) S H E L L of an elegant shape, thin, semitransparent, and rather glossy: sculpture, numerous and delicate spiral striae which cover the whole of the shell; there are from 30 to 40 on the body-whorl, 12 to 15 on the penultimate, 8 to 10 on the next, and 6 to 8 on the preceding whorl; the uppermost two whorls are apparently smooth, but show under the microscope indistinct traces of the striae ; there 1 Delicate. 2 Bristly. 8 Neat. |
