ATTBICULIDiE. 73 



30. Pythia Argenytllei. 



Shell slightly perforate, elliptical, rather thin, scarcely striate* 

 pale fulvous, sprinkled with chestnut points and spots; spire 

 elongate, slender, conic, with concave outlines, and the apex 

 rather pointed ; varices indistinct, spotted with white ; whorls 

 ten to eleven, rather flat, more distinctly striated near the 

 linear suture, scarcely descending anteriorly, the last about as 

 long as the spire, attenuated and compressed in front ; aperture 

 nearly perpendicular, narrowly semiovate ; parietal teeth two, 

 the upper triangular, somewhat divided, the other strong, com- 

 pressed, entering, somewhat duplicate externally; columellar 

 plait strong, rather thickened, imperceptibly ascending; peri- 

 stome acute ; right margin straight at its upper part, slightly ex- 

 panded below the middle, bearing within three unequal teeth : 

 columellar margin dilated, reflexed, almost covering the um- 

 bilicus. Length 26, greatest breadth 13, least breadth 9| 

 mill. 



Pythia Argenvillei, Pfr. in Zeitschr.f. Malak. 1853, p. 191 ; Syn. 

 Auric, n. 94; Mon. Auric, p. 96. 



H. and A. Adams, Gen. rec. Moll. p. 240. 

 D'ArgenviUe, Conch, t. 9 (12). /. T. 



/3. Smaller, pale greyish horn-coloured, with few spots ; 

 varices brown-bordered. Length 22, greatest breadth 12 mill. 

 Hah. North coast of Australia. 



31. Pythia Macgilliyrayi. 



Shell subperforate, elliptical, acuminated, thinish, nearly 

 smooth, black : spire elongated, conic, with the outlines rather 

 concave, and the apex pointed ; varices white, slightly spotted 

 with brown points; whorls nine, flat, arcuately striated near 

 the suture, much descending anteriorly, the last scarcely longer 

 than the spire, attenuated at base ; aperture nearly perpendi- 

 cular, extremely narrow ; parietal teeth two, the upper small, 

 trigonal, the other compressed, entering, simple; columellar 

 plait thin, compressed, ascending arcuately; peristome sharp; 

 right margin straight above, slightly expanded below the mid- 

 dle, bearing within two nearly equal teeth; columellar margin 

 dilated, closing partially or completely the umbilicus. Length 24, 

 greatest breadth 11, least breadth 9 mill. 



Pythia Macgillivrayi, Pfr. in Proc. Zool. Soc. 1854, p. 298 ; Mon. 

 Auric, p. 97. 



H and A. Adams, Gen. rec. Moll. ii. p. 210. 

 Hah. Isle of Aneiteum, New Hebrides (MacijiUkray). 



