aubiculid^;. 39 



suture, the last forming about three-fifths of the total length, 

 convex, attenuated at base ; aperture rather oblique, semiovate ; 

 parietal plait one, horizontal, produced externally into an obtuse 

 keel surrounding the umbilical region ; columella! plait oblique, 

 reaching the margin of the aperture ; peristome sharp ; right 

 margin smooth, dilated above in front; basal margin rather 

 expanded. Length 15-16, breadth 8 mill. 



Auricula australis, Quoy and Gaim. Voy. Astrol. ii. p. 169. pi. 13. 

 f. 34-38. » V V 



Desk, in Lam, Hist. viii. p. 333. n. 15. 



Reeve, Conch, Syst. ii. pi. 187. f. 3. 



Kust. Auric, p. 47. t. 7. f. 9, 10. 



Forbes in Voy. Rattlesnake, App. p. 361. 

 Auricula ovata, Gray, Spic. Zool. p. 8. t. 6. f. 21. 

 Auricula bidens, " Say," Potiez et Michaud, Gal. Douai, i. p. 201. 



pi. 20. f. 9, 10. 

 Ophicardelus australis, Beck, Ind. p. 108. n. 1. 



Gray in Proc. Zool. Soc. 1847, p. 179. 



M. E. Gray, Fig. Moll, Anim. pi. 306. f. 8, 9. 



H. and A. Adams in Proc. Zool, Soc. 1854, p. 34. n. 1 ; Gen. 

 rec. Moll, ii. p. 245. pi. 82. f. 9, 9a. 

 Melampus australis, Pfr. Syn. Auric, n. 51 ; Mon. Auric, p. 52. 



Hub. Australia : Port Western and Van Diemen's Land ( Quoy) ; 

 Brisbane Water (Macyillivray). 



57. Melampus costellaris. 



Shell rimate, ovate-conic, solid, ribbed longitudinally, brown, 

 with irregular pale streaks ; spire conic, blunt ; suture irregu- 

 larly impressed ; whorls five to six, the upper ones flat or rather 

 excavated, the last forming about four-sevenths of the total 

 length, very obsoletely angled, and girdled with a pale line at 

 its upper circumference, somewhat tuberculate at base ; aper- 

 ture nearly perpendicular, sinuately ovate; parietal plait one, 

 strong, deep, rather transverse ; columella! plait a little smaller, 

 produced externally ; peristome blunt ; right margin sinuated 

 above, then thickened by an internal deposit ; columella! margin 

 dilated, rather adnate. Length llf, breadth 6^ mill. 



Melampus costellaris, //. and A. Adams in Proc. Zool. Soc. 1854, 

 p. 12. n. 36. 



Pfr. Syn, Auric, n. 52 ; Mon. Auric, p. 53 ; Novit. Conch, i. 

 p. 22. n. 36. t. 6. f. 15, 16. 

 Tralia (Persa) costellaris, If. and A. Adams, Gen. rec. Moll. ii. 

 p. 245. 



Hab. New Zealand (Mr. Strange). 



