Bathytotiia.] GASTROPODA. 493 



4. Bathytoma gratiosa, Suter, 1908. Plate 21, fig. 18. 



Bathytoma gratiosa, Suter, P. Mai. S., viii, 1908, 186, pi. 7, f. 19. 



Shell very small, fusiform, white, thin, turriculate, spirally dis- 

 tantly ribbed, and with numerous axial threads. Sculpture : The 

 spire-whorls below the smooth protoconch have a fine thread margining 

 the suture below, a second very prominent spiral cord on the angle 

 of the shoulder, and a third equally strong cord at the middle between 

 the angle and the suture below ; the interstices concave and broader 

 than the cords ; body-whorl 6 spirals from the angle down toward 

 the base, the upper three of which are strong, the others closer together 

 and not so high ; base with a few indistinct spirals. Axial sculpture 

 consisting of subequidistant fine threads, slightly retrocurrent on the 

 shoulder, nexuous further down ; on the body-whorl they are becoming 

 more irregular, fine growth-lines appearing in the interstices. Colour 

 whitish. Spire conic, turriculate, about the same height as the aper- 

 ture. Protoconch globular, smooth, of lj whorls. Whorls 4, with a very 

 distinct and but slightly sloping shoulder ; base somewhat contracted. 

 Suture superficial, margined. Aperture subpyriform, angled above, 

 with a short and broad canal below, slightly emarginate at the base. 

 Outer Up angled above, then convex, contracted below, thin and sharp, 

 crenulated on the outside by the spirals ; sinus rounded, not deep, 

 situate just above the carina. Columella straight, smooth, concave 

 on meeting the parietal wall, bent to the left towards the canal below. 

 Inner lip thin, narrow, extending over the faintly convex parietal 

 wall, tapering to a fine point below. Operculum unknown. 



Diameter, 2 mm. ; height, 3-7 mm. 



Animal unknown. 



Type in my collection. 



Hob. --Port Pegasus, Stewart Island, in 18 fathoms (Captain 

 Bollons). 



5. Bathytoma nodilirata, Murdoch and Suter, 1906. Plate 21, 

 fig. 19. 



Pleurotoma (Hemipleurotoma) nodilirata, M. & S., T.N.Z.I., xxxviii, 1905 

 (1906), 284, pi. 22, f. 10, 11. P. tuberculata, T. W. Kirk, T.N.Z.I., xiv. 

 1881 (1882), 409; Hutton, Plioc. M., 50, pi. 6, f. 29; not of Gray. 

 Bathytoma nodilirata, M. & S. : Suter, T.N.Z.I., xl, 1907 (1908), 351. 



Shell fusiform, biconical, with nodulous keeled whorls, pyriform 

 aperture, and short open canal. Sculpture : The last whorl with about 

 16 tubercles on the keel, and a similar number of spiral cords below, 

 the upper six of which are widely spaced and narrower than the 

 interspaces; those upon the base and canal are smaller and crowded. 

 Above the aperture is a single cord, which persists on the whorl above, 

 but disappears in the suture of the next whorl. Monilo-spiral thread- 

 lets adorn the sinus-area, also the tubercles. All the upper whorls, 

 except the protoconch, have tubercles on the keel, and there is a row 

 of small nodules below the suture. The axial sculpture consists of 



