Seila.} GASTROPODA. 253 



and thinly spread over the columella and parietal wall. Opcrculum 

 unknown. 



Diameter. 3-8 mm. ; height, about 10-5 mm. 



Anilnal unknown. 



Type in my collection. 



Hab. Bay of Islands (J. C. Anderson). 



Remark. In sculpture this species equals the Pliocene Bittium 

 cinctum, Hutton (which is a Seila). but the fossil species has more 

 whorls, is higher, and the outlines of the spire are perfectly straight. 



4. Seila dissimilis, Suter, 1908. Plate 14, fig. 28. 



Seila dissimilis, Suter, P. Mai. S.. viii. 37. pi. 3, f. 47. 



Shell minute, subcylindrical, rather thin. Sculpture : The first 2 

 whorls are smooth, the succeeding ones have 3 prominent, unequal, 

 equidistant, and flat cinguli, the uppermost narrower, lower, and close 

 to the suture ; the last whorl has a fourth cingulum toward the base, 

 but quite close to the upper one ; indistinct axial riblets and fine 

 growth -striae are visible in the interstices ; the cinguli on the third 

 to fifth whorl are faintly nodulous, but those on the later whorls re- 

 main smooth. Colour light yellowish-white. Spire high, subcylin- 

 drical. much higher than the aperture ; outlines straight. Protoconch 

 paucispiral, globose, of 2 smooth and convex whorls. Whorls about 6, 

 regularly increasing, very little convex ; base smooth, slightly con- 

 cave. Suture not deep. Aperture sub quadrangular, with a short and 

 open canal below. Outer lip sinuated by the spiral sculpture. Basal 

 Up almost straight. Columella subvertical, nearly straight, narrow- 

 ing to a point below. Operculum unknown. 



Diameter, 0-8 mm. ; height, 2-5 mm. 



Animal unknown. 



Type in my collection. 



Hab. Snares, in 50 fathoms (Captain Bollons). 



5. Seila terebelloides, von Martens, 1873. Plate 14, fig. 29. 



Cerithium (Bittium) terebelloides, v. Mts., Grit. List. 26. C. chictnm, Hutton, 

 C.M.M.. 27. Bittium terebelloides, v. Mts. -. Hutton, M.N.Z.M., 74. 



Shell small, subcylindrical, thin and fragile. Sculpture consisting 

 of 3 spiral keels of equal strength, and equidistant on the upper whorls, 

 the last with 4 keels and a fifth below the periphery of the base, which 

 is less elevated ; interstices with fine, sharp, and crowded growth.- 

 lines. Colour brown or yellowish. Spire subulate, much higher than 

 the aperture, sharply pointed. Protoconch long, cylindrical, of 4 con- 

 vex and smooth whorls, the nucleus mamillate. Whorls 16, slowly 

 and regularly increasing, flat ; base flattened. Suture inconspicuous, 

 situate in a deep channel formed by the spiral keels. Aperture sub- 

 quadrangular, with a very short, open, and slightly oblique canal, 

 which is broadly notched. Outer lip thin and sharp, denticulated 



