32 AURICULIDJE. 



Melampus trifasciatus, Pfr. Syn. Auric, n. 38 ; Mon. Auric, p. 43. 



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

 Hab. ? 



43. Melampus trxlineatus. 



Shell obovate, dark brownish-red, with three spiral distant 

 white lines on the last whorl, of which the anterior line is 

 not so well defined, rufous on the columella, with irregular 

 striae of growth ; apex obtuse ? spire very small, with curvi- 

 linear outlines ; whorls six to seven ? very narrow, imbri- 

 cately appressed, with the suture distinct ; last whorl very large, 

 convolute ; aperture veiy long, narrow ; labrum not sharp, with 

 a deposit over the whole visible interior, which is transversely 

 plaited ; at the end of the columella is a twisted plait, sepa- 

 rated by a sinus from a large transverse plait, above which are 

 four small approximate transverse plaits. Length 0-71, breadth 

 0*43 inch. {Adams.) 



Auricula trilineata, C. B. Ads. in Ann. Lye. N. York, v. p. 436. 543. 

 Melampus trilineatus, Pfr. Syn. Auric, n. 39 ; Mon. Auric, p. 44. 



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

 Hab. Panama. 



§ 6. Labrum furnished with indistinct transverse ridges. 



44. Melampus pykiformis. 



Shell imperforate, fusiformly oblong, solid, smooth, striated 

 irregularly and minutely, olivaceous-brownish, with yellow 

 spots and short streaks ; spire very short, conic, with the apex 

 pointed, blackish ; suture linear, irregular ; whorls seven, the 

 upper ones rather flat, the last forming about four-fifths of the 

 total length, very indistinctly angulated above the middle, at- 

 tenuated towards the base ; aperture scarcely oblique, oblong- 

 semiovate, purplish-brown within ; parietal plaits two (rarely 

 three to four), the upper ones deep, indistinct, the last small, 

 tooth-shaped, entering; columellar plait twisted, prominent; 

 peristome pale-bordered ; right margin almost smooth within, 

 or bearing three slight transverse ridges, slightly arcuate, 

 sinuated above ; columellar margin rather callous. Length 13%, 

 greatest breadth 8 mill. 



Auricula piriformis, Petit in Proc. Zool. Soc. 1842, p. 202. 

 Auricula maura, Kiist. Auric, p. 37. t. 5. f. 12-14. 

 Conovulus maurus, Miihlf. MSS. 



Anton, Verzeichn. p. 48. n. 1778. 

 Pythia maurus, Anton in lit. 



Melampus piriformis, H. and A. Adams in Proc. Zool. Soc. 1854, 

 p. 10. n. 7, and 



