GASTEROPODA. 17 



53. P. (Polytropa) qUOyi, Reeve; P. tristis, Dunker, Voy. 

 Novara, Zoology. Ovate, sub-conical ; whorls convex, transversely 

 ribbed ; ribs unequal ; right lip thin, grooved interiorly ; columella 

 slightly excavated ; canal short. Whitish brown, ribs darker ; colu- 

 mella chestnut brown, or light red ; outer lip variegated with black 

 and white, canal blackish brown. Length, 1; breadth, '5; angle of 

 spire, 70. 



Common. Chatham Islands. 



This species differs from the last in being smoother, the spire 

 shorter, and the ribs less pronounced ; the columeila is more excavated 

 and broader, and the canal shorter. 



RXCXNULA. 



Shell thick, tuberculatecl, or spiny ; aperture contracted by callous 

 projections on the lips. 



India. China. Philippines. Australia. Pacific. 



* 54?. R. iodOStOHia, Lesson; Desliayes, Anim. sans, vert., x.,p. 

 54. Shell ovate, thick, ponderous, rather depressed, spire very short ; 

 transversely striated, and obsoletely ribbed ; ribs more prominent at 

 the margin ; aperture strongly toothed, thickened at the upper part. 

 Whitish, ribs brownish black, intermediate stria? brown ; aperture 

 bright pinkish purple. Length, 1'4 ; breadth, 1*2. (Reeved) 



FAMILY OXIVID^. 



Shell sub-cylindrical, polished ; columeila callous, aperture elon- 

 gated ; operculum small or rudimentary ; animal with a large foot, 

 often enclosing part of the shell, and forming two lobes in front. 



OLIVA. 



Spire very short, aperture linear, notched in front ; operculum 

 none. 



Sub-tropical. 



* 55. p. (Ispidula) erythrostoma, Lamark, i.e., x., p. 606. 



Shell white, with longitudinal, irregular, zig-zag lines of purplish 

 brown and yellow, and with two interrupted bands of brown ; interior 

 reddish orange or saffron. Length, 2'65. 

 Taken home by Dr. Stauger. 



ANOILLARIA. 



Shell like Oliva, but the spire more produced, covered with an 

 enamelled coat. 



Madaascar. Red Sea. India. Australia. Pacific. 



56. A. (Anaulax) australis, Quoy, lc., \\\.,p. 20; A. 



cata, Quoy, I.e., iii., p. li). Shell ob-ovate, spire accuminate, callously 

 obtuse in old shells ; columeila constrictedly twis. 3d ; an obsolete tooth 

 near the anterior end of the outer lip. Leadt -\\ blue or brownish 

 purple-in the centre, often margined with white, both ends generally 

 3 



