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Show 1879.] MR. E. A. SMITH ON MOLLUSCA FROM JAPAN. 205 53. Fusus PACHYRHAPHE. (Plate XX. figs. 37, 37a.) Shell shortly fusiform, biconical, dull light brown, pale at the angulation of the whorls. Whorls 8, of which the two apical are smooth and convex; the rest slopingly excavated above, rather sharply angled at the middle, and flattish beneath, longitudinally plicate and spirally grooved and ridged ; plica? eight or nine on a whorl, attenuating in the concavity, and again becoming more developed upon a thickening at the upper margin of the whorls consisting of two prominent lira? ; the transverse ridges are all beautifully imbricately squamous through the elevated undulating lines of growth ; two or three beneath the angle stouter than the rest and subnodulous upon the plicae ; on the penultimate whorl there are about from eight to nine, and on the last about twenty-two, generally alternately fine and coarser ; the costa? attenuate inferiorly and extend almost to the extremity. Aperture elongate, more or less tinged within with fleshy brown, with the canal being rather longer than the spire, armed with about six short lira?, which do not attain to the crenulated margin of the lip ; columella livid pinkish, straightish above, and oblique below the middle; canal short and recurved. Length 21 millims., diam 9. Length of aperture and canal 12. A smaller specimen is 16 long, 6 broad, and the aperture has a length of 8 millims. (Fig. 37a.) Hab. Stations 8 and 27. The largest specimen from the latter locality differs from the rest in having one plication less on a whorl, and the aperture proportionally longer. In all other respects it agrees ; and I feel convinced that they all belong to one and the same species. It belongs to the same section of Fusus as F. imbricatus, Smith, from New Caledonia. 54. SIPHONALIA CASSIDARIIFORMIS, Reeve. Buccinum cassidariceformis, Reeve, Conch. Icon. iii. fig. 11; Lischke, Jap. Meer.-Conch, i. p. 38, pi. 4. f. 1-10 (as Siphonalia). Hab. Stations 5 and 17. The operculum of Siphonalia is described by A. Adams as fusoid. In this species it is not of the typical form, as the nucleus, instead of being terminal, is situated within the outer margin at the distance of three millimetres from the lower or narrowed extremity. 55. SIPHONALIA SPADICEA, Reeve. (Plate XX. fig. 38.) Buccinum fusoides, Reeve, Conch. Icon. iii. pi. 9. f. 64. Buccinum spadiceum, Reeve, I. c. (Errata). Siphonalia spadicea, A. Ad. Ann. & Mag. Nat. Hist. 1863, vol. xi. p. 203. Hab. Stations 25 and 32, and Port Hamilton, 10 fathoms, 34° 32' N. lat., 127° 15' E. long. " Mino-Sima 63 fathoms" (A. Ad.). The specimen described by Reeve is somewhat worn and the colouring faded. In fresh examples, besides the brownish irregular blotching, chiefly between the plications, there are certain of the |