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Show 1879.] MR. E. A. SMITH ON MOLLUSCA FROM JAPAN. 211 are coarsest on the upper whorls, gradually becoming finer penultimate, and then nearly obsolete on the last. Notwithstanding this difference from the types, in which the ribs become thicker from the upper part downwards, its more slender form, more convex whorls, and more turreted spire, I believe this shell to be a delicately sculptured form of this species; for the colouring and the peculiar varices are of precisely the same character. The operculum is coarsely serrated along the outer margin. 70. NASSA (NIOTHA) STIGMARIA, A. Adams. Natha stigmaria, A. Adams, P. Z. S. 1851, p. 96 ; Reeve, Con. Icon. fig. 42. N. densigranata, A. Ad., Reeve, fig. 181. Hab. Station 10. Philippine Islands (Cuming), Ooshima (Capt. St. John), Andaman Islands (Capt. Wilmer). This species is subject to considerable variation in size. The type figured by Reeve is the largest specimen I have seen, being 20 millims. long and 10^ broad. Another, the type of densigranata, has a length of 12 millims. and a breadth of 6\. 71. NASSA (HIMA) FESTIVA, Powis. Nassafestiva, Powis, Reeve, Conch. Icon. fig. 117. N. lirata, Dkr. Moll. Jap. pi. 1. f. 22. Hab. Station 8*. Other localities recorded are Decima, Nagasaki, and Hakodadi. The home first assigned to this species, namely Panama and St. Helena, is only one of the numerous errors occuring in the Cumingian Collection. If this had not occurred, Dunker would never have redescribed the species. 72. NASSA (HIMA) FRATERCULUS, Dunker. Nassa frater cuius, Dkr. Moll. Jap. pi. 1. f. 15; Lischke, J. M.- Conch. ii. pi. 4. f. 7-8; Schrenck, Reise Amurland, p. 435. ? N. plebecula, Gould, Proc. Bost. Soc. Nat. Hist. 1860, p. 332; Otia Conch, p. 128. Hab. Stations 5 and 8*. Other localities are Decima, Ousima, Hakodadi, Tatiyama, Simoda, Nagasaki, and O-Sima. One specimen differs from the rest in having fine transverse brown lines on the raised ridges between the grooves, and not in the latter as is usual. Another one is black with a single median narrow yellow zone. 73. NASSA (HIMA) TENUIS, Smith. Nassa tenuis, Smith, Ann. & Mag. Nat. Hist. 1875, xv. p. 423. N. japonica, Lischke, Jap. M.-Conch. iii. p. 37, pi. 2. f. 20-23. ?? JV. japonica, A. Ad. P. Z. S. 1851, p. 110. Hab. Station 21. The type of Adams's species described from the Cumingian Collection is not to be found. On this account, and considering that 14* |