Neolepton.} PELECYPODA. 925 



2. Neolepton citrinum, Hutton, 1883. Plate 53, tig. 1'2. 



Kellia citrina, Hutton, N.Z.J.S., i, 1883, 477 ; T.N.Z.I., xvi, 1883 (1884), 

 215 ; P.L.S. N.S.W., ix, 525 ; Index, 91. 



Shell minute, ovato-rotund, finely concentrically striate, slightly 

 inequilateral, somewhat inflated, yellowish. Beaks prominent, swollen, 

 approximate, slightly inclined forwards. Anterior end slightly shorter 

 than the posterior, acutely rounded at the middle ; posterior end 

 regularly convex ; basal margin broadly rounded. Sculpture con- 

 sisting of regular concentric sharp lines. Colour pale-yellowish. In- 

 terior yellowish-white, polished. Margins smooth. Hinge : Right 

 valve anteriorly with a large basal tooth, hooked at its posterior end, 

 surmounted by a thin lamella which is equally hooked ; the resilifer 

 narrow, oblique ; behind it 2 long lamelke, the lower one much 

 stronger ; left valve with a rather stout triangular tooth, consist- 

 ing of 2 swellings connected by a thin lamina ; behind the resilifer 

 a rather strong elongated lamella. Adductor-scars subequal, round. 



Diameter Ant. -post., 2mm.; dorso-ventral, 1-75 mm. : thick- 

 ness, 1-3 mm. 



Type in the Canterbury Museum. Christ-church. 



Hob. Tamaki Heads, near Auckland, type (T. F. Cheeseman) ; 

 Narrow Neck and Maloney's Reef, Hauraki C4ulf (H. S.), in sand at 

 low- water mark. 



3. Neolepton sanguineum, Hutton, 1883. Plate 53, figs. 13, a, b. 



Kellia sanguinea, Hutton, N.Z.J.S., i, 1883, 478 ; T.N.Z.I., xvi, 1883 (1884), 

 215 ; P.L.S. N.S.W., ix, 526. Neolepton sanguineum, Hutton : Bernard, 

 Bull. Mus. Hist, Nat., Paris, 1897, 313, f. 4 in text (hinge) ; Index, 92. 



Shell minute, ovato-rotund, swollen, subequilateral, concentrically 

 striate, whitish with red at the umbones. Anterior end very little 

 shorter than the posterior, both regularly convex, basal margin broadly 

 rounded. Sculpture consisting of fine, regular, sharp concentric lines. 

 Colour yellowish-white, the umbones bright carmoisin or flesh-colour. 

 Interior white with dashes of red towards the beaks, polished. 

 Margins smooth. Hinge : Right valve anteriorly with a large tri- 

 angular tooth near the ventral border, and a long slender lamina 

 above, which is hooked posteriorly, behind the oblique resilifer 2 

 diverging laminae united below the beak ; left valve with an anterior 

 hook-shaped strong tooth and a posterior lateral lamina. Adductor- 

 scars subequal, ovate, distinct. 



Diameter Ant.-post.. 3mm.; dorso-ventral, 2-7 mm. : thick- 

 ness, 1'7 mm. 



Type in the Canterbury Museum, Christchurch. 



Hab. Foveaux Strait (type) ; Whangaroa Harbour (C. Traill) ; 

 Lyttelton Harbour (H. S.) ; off Dunedin Heads (A. Hamilton) ; Port 

 Pegasus, Stewart Island, in 18 fathoms ; near the Snares, in 50 

 fathoms (Captain Bollons). Also Victoria (Gatliff). 



