412 GASTROPODA. [Pectinibranchia 



of 1| smooth and convex whorls, the globular nucleus slightly lateral. 

 Whorls 5, regularly increasing, convex ; base contracted towards the 

 canal. Suture but little impressed, undulating, margined below. 

 Aperture subvertical, ovate, angled above, produced below into a 

 moderately long, oblique, and slightly recurved widely open canal. 

 Outer lip thin and sharp, convex, crenulated by the, spiral sculpture, 

 smooth inside. Columella vertical, straight, twisted and narrowed 

 below. Inner lip thin and narrow, extending over the excavated 

 parietal wall, drawn out to a narrow ridge towards the inner margin 

 of the canal. Operculum unknown. 



Diameter, 3-5 mm. ; height. 7 mm. 



Animal unknown. 



Type in the Canterbury Museum. Christchurch. 



Hob. Off south-east of Cape Saunders. in 100 fathoms (E. R. 

 Waite). 



Remarks. This species is nearly allied to T. curtus, but it is larger, 

 has the whorls not shouldered, no colour-bands, and the strong spiral 

 on the neck of the canal is also wanting ; the protoconch has convex, 

 not carinated, whorls. 



8. Trophon corticatus, Button, 1873. Plate 46, fig. 16. 



Fusus corticatus, Hutt., C.M.M., !). Trophon Pairce, C'rosse : Hutton. 

 M.N.Z.M., 49 ; not of Crosse. Kalydon duodecimus, Gray : Hutton, 

 T.N.Z.I., xvi, 220. Trophon duodecimus. Gray : Hutton, Plioc. M., 39, 

 pi. 6, f. 7 ; Index, 72, not of Gray. 



Shell small, fusiform, solid, yellowish or brown, spirally lirate and 

 axially costate. Sculpture consisting of distant broadly rounded 

 axial costpe. about 12 on a whorl, sometimes getting obsolete on the 

 last whorl, crossed by spiral mostly very unequal and flatly rounded 

 line, the. narrow grooves between them often with laminated growth- 

 lines ; fasciole distinct, lamellate ; sculpture mostly more 01 less 

 hidden by a thick growth of nulliporites. Colour yellowish, sometimes 

 the spirals purplish or uniformly purplish-brown, inside whitish or 

 brown. Spire high, narrowly conic, usually higher than the aperture 

 with canal. Protoconch papillate, of 2^ convex whorls, the nucleus 

 smooth, the rest spirally lirate. Whorls about 8, first slowly de- 

 scending, generally distinctly shouldered, convex below ; base con- 

 tracted above the canal. Suture not deep, lightly undulating. Aper- 

 ture, subvertical, narrowly oval, angled above, produced below into a 

 short and open canal, which is slightly recurved and bent to the left. 

 Outer Up sharp, crenulated by the spiral ribs, toothed or lirate within, 

 slightly angled above. Columella vertical, almost straight, drawn out 

 to a fine edge toward the canal. Inner Up rather broad, extending 

 over the. concave parietal wall. A narrow umbilical chink is sometimes 

 present. Operculum with a subapical nucleus. 



Diameter, 9-5 mm. ; height, 19 mm. 



