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Show 270 MR. E. A. SMITH ON THE MOLLUSCA [May 6, generally with a few inconspicuous red lines beneath the suture at the middle of the body-whorl. Whorls 9 ?, long, very slightly convex, divided by a moderately oblique suture, more or less longitudinally plicate and spirally striate. Aperture about the same as in M. apiensis. Supposed length 63 millim., diam. of last whorl 14 ; aperture 15 long, 10 broad. The plications in this species are more strongly developed in some specimens than in others, and become somewhat obsolete towards the lower part of the whorls, and being cut across by the spiral stria?, which are not very close together (perhaps a dozen on the penultimate volution), are somewhat subgranose. The striae also at times are more or less wanting. The apex of this species, as in some others, becomes peculiarly eroded, leaving only the central black column like a piece of thin wire remaining. 6. MELANIA ORDINARIA. (Plate XXIII. figs. 13, 13 a.) Shell like M. turbans, but with rather shorter whorls, smaller, smooth, without longitudinal plicae, and with only a few indications of spiral striations, except at the lower part of the body-whorl, where it is finely striated. Body-whorl broader and shell generally more slender ; without red markings as a rule, judging from nine specimens at hand, of which only two exhibit a few short narrow lines below the sutures. It is a less slender species than M. apiensis, with less and finer spiral sculpture, and without the conspicuous red markings of that shell. Probable length 50 millim., diam. 13. 7. NERITINA SIDEREA, Gould. About thirty small specimens of this species were collected at Api. The majority of them are almost entirely black, with the exception of the eroded apex, which is white. Two specimens, however, are white, with numerous wavy black lines leaving a number of small, white, triangular spots. The species has previously been recorded from the Fiji Islands, Roratonga, and Samoa Islands ; and a large variety, collected at the Solomon Islands by Mr. J. Brazier, is mentioned in the Proc. Linn. Soc. vol. xii. Zoology, p. 556. FIJI ISLANDS. Only a single novelty appears among the sixteen species collected at these islands, which are as follows:-1. Placostylus 7norosus, Gould; 2. P.seemanni, Dohrn; 3. P. rambiensis, Garrett; 4. Helix (Xesta) pfeifferi, Philippi ; 5. H. (Trochomorpha) latimaryinata, sp. n. ; 6. Helicina tectiformis, Mousson ; 7. H. beryllina, Gould 8. Neritina prichardi, Dohrn ; 9. N. variegata, Lesson ; 10. A. san-dalina, Recluz ; 11. A7", porcata, Gould ; 12. A7", rubida, Pease ; 13. Navicella freycineti, Recluz ; 14. Nav. macrocephala, Le Guillou; 15. Nav. bougainvillei, Recluz; 16. Batissa tenebrosa, Hinds. These were not all obtained at one particular island-Nos. 1, 3, 5, 0, |
