AUBicuLnxa:. 17 



middle-sized, rather compressed parietal plait below the middle ; 

 columellar plait stronger, obliquely produced to the margin ; 

 peristome thin ; right margin sharp, slightly arched, furnished 

 within with four to five distant whitish ridges; columellar 

 margin dilated, callous, shining, brownish orange-coloured. 

 Length 10, breadth 6 mill. 



Melampus parvulus, Nuttall, MSS. 



Pfr. Si/n. Auric, n. 11 ; Mon. Auric, p. 24. 



H. and A. Adams, Gen. rec. Moll. ii. p. 243. 

 Hah. Isle of Oahu. 



14. Melampus Adamsianus. 



Shell subrimate, ovate-oblong, rather solid, smooth, blackish- 

 green ; spire convexly conical, pointed ; suture linear ; whorls 

 nine, fiat, the upper ones somewhat plaited, the last forming 

 two-thirds of the total length, indistinctly angled above, marked 

 near the suture with one larger and several narrow pale bands, 

 irregularly sculptured with stria? of growth, rounded in front ; 

 aperture nearly perpendicular, narrowly semiovate ; one middle- 

 sized, compressed, transverse parietal plait; columellar plait 

 oblique, produced outwards ; peristome straight, bordered with 

 white ; right margin sinuate above, furnished within with six 

 to seven short white ridges ; columellar margin callous, slightly 

 dilated. Length 10, breadth 5 mill. 



Melampus Adamsianus, Pfr. in Proc. Z. S. 1854, p. 121 ; Si/n. 



Auric, n.12; Novit. Conch, i. p. 18. n.29. t.5. f. 17-19; Mon. 



Auric, p. 24. 

 Tralia (Pira) Adamsiana, H. fy A.Adams, Gen.rec.Moll. ii. p. 244. 

 Hub. New Zealand. 



15. Melampus Zealandicus. 



Shell rimate, conoidally ovate, rather solid, irregularly striated, 

 slightly shining, hom-eoloured brownish ; spire conoidal, acutely 

 mucronate; suture linear; whorls nine, flat, the last forming 

 about two-thirds of the total length, rather swollen above, 

 somewhat lessened towards the base, with a swollen tubercle ; 

 aperture perpendicular, narrowly semiovate, rounded in front; 

 one middle-sized, rather transverse parietal plait; columellar 

 plait obliquely produced to the margin; peristome acute, bordered 

 with brown ; right margin furnished within with a white callus, 

 which sends oft' eight to nine short ridges ; columellar margin 

 slightly thickened. Length 8|, breadth 5 mill. 



Melampus Zealandicus, II. and A. Adams in Proc. Z. S. 1854, 

 p. 12. n. 23 ; Gen. rec. Moll. ii. p. 243. 



