390 GASTROPODA. [Pectinibranchia. 



higher than the aperture ; outlines nearly straight. Protoconch minute, 

 of 2 smooth whorls. Whorls 8, first slowly increasing, the last 

 high, depressed, and lightly concave below the suture, thence flatly 

 rounded ; base contracted. Suture not deep, undulating. Aperture 

 subvertical, oval, channelled above, with a short, oblique, widely open, 

 and deeply notched canal at the base. Outer lip contracted above, 

 lightly sinuate, convex below, sharp, somewhat thickened and lirate 

 within, the interspaces dark brown. Columella vertical, but little 

 excavated. Inner lip moderately broad, spreading over the parietal 

 wall, which has a roundish callosity below the suture, narrowing 

 rapidly below, twisted, and forming as a solid lamella the inner margin 

 of the canal. Fasciole prominent, keeled. Operculum horny, dark 

 brown, oval, nucleus apical. 



Diameter, 17mm.; height, 34mm. (from fig. in Voy. Astrol). 

 Diameter, 18 mm. ; height, 36 mm. (large specimen, Auckland). 



Dentition. Button, "T.N.Z.I., xv, 120, pi. 13, f. K. 



Type in the Mus. Hist. Nat., Paris (B. lineolatum, Q. & G.). 



Hob. From the Bay of Islands to East Cape, common ; Kermadec 

 Islands. 



Fossil in the Pliocene. 



10. Cominella zealandica, Reeve, 1846. Plate 45, fig. 11. 



Buccinuw zealandicum, Reeve, Conch. Icon., iii. pi. 4, f. 28. Cominella 

 zealandica, Reeve, Man. C'onch. (1), iii, 183, pi. 79, f. 384 ; Suter, 

 T.N.Z.I., xxxviii, 330. 



Shell rather small, elongated oval, solid, spirally lirate and axially 

 costate, with revolving lines of brown spots. Sculpture consisting of 

 close, narrow, and rounded cinguli. alternately narrow and broader, 

 crossed by axial, distinct, broadly rounded ribs, cut up into nodules 

 at the points of intersection with the spirals, 12 to 14 on the pen- 

 ultimate whorl ; they are, with the exception of the protoconch, 

 present on all whorls, but obsolete on the base ; growth-lines incon- 

 spicuous. Colour yellowish-white, with irregularly distributed brown 

 spots on the larger cinguli ; aperture light brown or whitish within. 

 Spire conical, somewhat turreted, its height about the same as that 

 of the aperture : outlines slightly convex. Protoconch small, smooth. 

 Whorls 6, first slowly increasing, the last very high, quite two-thirds 

 of the total height, lightly shouldered, moderately convex below 

 the angle ; base slightly contracted. Suture impressed, undulating. 

 Aperture subvertical. oval, channelled above, with a short, open, and 

 deeply notched canal below. Outer lip slightly expanded, convex, 

 sharp, thickened and dentate within. Columella vertical, straight, 

 smooth. Inner lip moderately broad, extending over the parietal 

 wall, which has a rounded callosity below the suture ; narrowed below 

 and produced as a twisted lamella to form the inner margin of the 

 canal. Operculum unknown. 



