270 MR. E. A. SMITH ON THE MOLLUSCA [May 6, 



generally with a few inconspicuous red lines beneath the suture and 

 at the middle of the body-whorl. AYhorls 9 ?, long, very slightly 

 convex, divided by a moderately oblique suture, more or less longi- 

 tudinally 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 iu 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 

 strire, 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 plicse, 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 tbat shell. 



Probable length 50 millim., diam. 13. 



/. 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, how- 

 ever, 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 morosus, 

 Gould ; 2. P.seemanni, Dohrn ; 3. P. rambiensis, Garrett ; 4. Helix 

 {Xesta) pfeifferi, Philippi ; 5. H. {Trochoinorpha) latimarginata, 

 sp. n. ; 6. Helicina tecfiformis, Mousson ; 7. H. beryllina, Gould ; 

 8. Neritina prichardi, Dohrn ; 9. N. variegata. Lesson ; 10. A^. san- 

 dalina, Rccluz ; 11. N. porcata, Gould; 12. N. riibida, Pease; 

 13. jS'avicella freycineti, Recluz ; 14. Nav. mucrocephala , Le Guillou ; 

 15. Nav. bougai?ivillei, Recluz; 16. Baiissa tenebrosa, Hinds. 

 These were not all obtained at one particular island — Nos. 1, 3, 5, 6, 



