1887.] MOLLTJSKS OF THK VITI ISLANDS. 289 



10. MeLAMPUS CREBRlSTRIATUSj Sp. nOV. 



Shell imperforate, solid, obovate, slightly shining, striated with 

 lines of growth and marked by rather crowded transverse incised 

 lines ; colour dark chestnut-brown or fulvous, with or without two 

 light chestnut bands ; spire mucronate, convexly conoid ; suture 

 distinct, linear ; whorls 7-8, subplanulate, the last one subangulate 

 on the shoulder ; the lower portion of the parietal region with two 

 subcoutiguous folds, the lower one small, and occasionally there 

 exists small posterior denticles; palate with from 10-18 whitish 

 laminae on a layer of whitish callus ; peristome and columella 

 fulvous. 



Length 10-13, diam. 6-7 millim. 



A few examples found near high-water mark on the north coast 

 of Vanua Levu. 



11. Melampus rusticus, sp. nov. 



Shell small, imperforate, obovate, finely striated, brown, with 

 irregular longitudinal fulvous stripes and small spots ; spire short, 

 conoid, apex eroded, truncate ; whorls 4 remaining, last one sub- 

 angulated, obliquely striated at the base ; aperture elongate, narrow, 

 slightly oblique, violaceous or brown, base rounded ; parietal region 

 •with an acute horizontal lamina just below the middle ; columellar 

 fold sharp, oblique, and continuous with the acute peristome ; palate 

 with 4-6 faint laminae. 



Length 7, diam. 5 millim. 



Rather common on the margins of mangrove-swamps. I also 

 found it in the Tonga and Samoa Islands. 



It is the same shape as, but smaller than, M. semisulcatus, with 

 which it is found associated. It is also darker coloured, and differs 

 from the latter in the absence of spiral sulcations and in having only 

 one parietal fold. 



12. Melampus incisus, sp. nov. 



Shell imperforate, obconic, solid, marked by fine incremental 

 striae and spiral incised lines, which are sometimes evanescent on 

 the middle of the body- whorl ; colour brown or luteous, with or 

 without four transverse chestnut bands, and frequently with irregular 

 longitudinal more or less interrupted fulvous lines and dots ; spire 

 short, conoid, apex eroded, truncate ; whorls 5 remaining, last one 

 subangulated above ; suture linearly impressed and slightly lacerated ; 

 aperture somewhat oblique, elongate, violaceous brown ; parietal 

 region with two contiguous folds just above the columellar plait, the 

 upper one the larger, above which are from two to six more or 

 less distinct denticles ; palate with five to fourteen white irregular 

 laminae ; columellar fold oblique, continuous with the peristome. 



Length 8-10 millim. 



Not infrequent on the margins of mangrove-swamps in Vanua 

 Levu. 



