AURICULIDiE. 11 



what twisted, forming an indistinct angle with the peristome, 

 which is simple, straight ; right margin scarcely arcuate, slightly 

 sinuate, furnished within with three transverse ridges ; colu- 

 mellar margin callous, shining. Length 11, breadth 5 mill. 



Melampus commodus, H. and A. Adams in Proc. Z. S. 1854, p. 12. 

 n. 34 ; Gen. rec. Moll ii. p. 243. 



Pfr. Syn.Auric.n.l; Novit. Conch. i. p. 23. n.38. t.6. f. 20-22; 

 Mon. Auric, p. 16. 



Hah. New Zealand. 



2. Melampus mitralis. 



Shell imperforate, ovate-oblong, solid, smooth, shining, fulvous 

 with pale bands ; spire convexly conic, with the apex rather 

 pointed; suture linear; whorls nine to ten, flat, the upper sculp- 

 tured with remote radiating furrows ; last whorl forming about 

 four-sevenths of the total length ; rather gibbous in front ; aper- 

 ture nearly perpendicular, narrow, angulated on both extremities; 

 no parietal plait; columellar plait strong, twisted, forming a 

 kind of prominent tooth at the base of the aperture ; peristome 

 simple ; right margin sharp, slightly transversely ridged within ; 

 columellar margin callous, adnate. Length 11, breadth 6 mill. 

 Melampus (Tralia) mitralis, H. and A. Adams in Proc. Z. S. 1854, 



p. 13. n. 38. 



Pfr. Syn. Auric, n. 2 ; Novit. Conch, i. p. 19. n. 32. t. 6. f. 5, 6; 

 Mon. Auric, p. 16. 

 Tralia mitralis, H. and A. Adams, Gen. rec. Moll. ii. p. 244. 



Hah. Mogador, Africa. 



3. Melampus Poeyi. 



Shell imperforate, oblong-fusiform, rather solid, slightly striate, 

 shining, chestnut-coloured, for the most part with one to two 

 narrow pale bands ; spire elongately conic, pointed ; suture very 

 slight, indistinctly bordered, irregular; whorls ten, increasing 

 gradually, the upper flat, the last a little longer than the spire, 

 slightly attenuated at the base ; aperture perpendicular, narrowly 

 semiovate, modified by the columellar plait, which is sharp and 

 scarcely ascending, and by a tooth on the labrum, opposite to the 

 columellar plait ; peristome simple, rather blunt ; right margin 

 slightly sinuated in front, furnished with several obsolete 

 ridges within ; columellar margin widely callous. Length 10, 

 greatest breadth 5 mill. 



Melampus Poeyi, Pfr. in Z.f. M. 1853, p. 126 ; Syn. Auric, n. 8 ; 

 Mon. Auric, p. 17. 



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

 Hah. Isle of Cuba. 



