Pupa.] GASTROPODA. 519 



above, rounded below, the columella bearing a massive bilobed spiral 

 fold, outwardly curving into the lower margin of the peristome ; 

 parietal wall bearing one or more smaller folds. Operculum trans- 

 verse, elongated, curved, with imbricate elements and a linear scar. 



Distribution. Subtropical and southern temperate Indo-Pacinc 

 seas ; a few species extending northward to Japan, and others south 

 to South Australia and New Zealand. 



Fossil in the Tertiary. 



KEY TO SPECIES. 



A. Height of spire about half that of the aperture. Sculptured with 



distant spiral grooves, the interstices broader ; whitish, some- 

 times tessellated with blackish . . . . . . . . a/finis. 



B. Height of spire nearly the same as that of the aperture. 



a. Sculptured with numerous somewhat unequal lirse, the inter- 

 stices of the same width . . . . . . . . alba. 



mi. Sculptured with crenate spiral grooves, the interspaces 



broader ; spirals close together on the base . . . . gracilis. 



]. Pupa affinis, A. Adams, 1855. Plate 22, fig. 22. 



Solidula affinis, A. Adams, P.Z.S., 1854 (1855). 61. Buccinulus affinis, 

 A. Ad. : Angas, P.Z.S., 1867, 225. Actceon (Buccinulus) affinis, A. Ad., 

 Chall. Rep., xv, 630, pi. 47, f. 3. Solidula, affinis, A. Ad., Man. Conch. 

 (1), xv, 141, pi. 20A, f. 52. Buccinulus Kirki, Hutton, C.M.M., 51. 

 Actceon Kirki, Hutt., Index, 69. Solidula Kirki, Hutt., Man. Conch. 

 (1), xv, 146. Buccinulus Huttoni, T. W. Kirk, T.N.Z.I., xiv, 1881 (1882), 

 268. Solidula Huttoni, Kirk, Man. Conch. (1), xv, 147 ; Index, 70. 



Shell cylindrical ovate, solid, whitish, tessellated with blackish 

 spots, spirally sulcate. Sculpture consisting of unequal rather dis- 

 tant spiral grooves, 5 to 7 on the penultimate whorl, crenulated by 

 growth-lines ; the interstices broader than the grooves, sometimes 

 very broad at the periphery of the last whorl, quite flat, striated by 

 fine growth-lines. Colour white or buff-white, frequently variedly 

 painted, tessellated with subquadrate irregular blackish spots. Spire 

 conical, with a sharp apex, about half the height of the aperture ; 

 outlines lightly convex. Protoconch minute, of 1| smooth whorls. 

 Whorls about 7, first slowly increasing, flattened, the last high ; 

 base moderately convex. Suture linear. Aperture narrowly pyri- 

 form, very narrow above, broader and rounded below. Outer lip 

 straight at the middle, solid, but with a sharp edge ; basal lip convex, 

 sometimes considerably produced. Columella with a stout oblique 

 rightly bifid plait, separated from the parietal wall by a narrow deep 

 groove ; on the lower part of the convex parietal wall a fine rather in- 

 conspicuous ridge. Inner lip rather thick, extending over the parietal 

 wall. Operculum unknown. 



Diameter, 6-5 mm. ; height. 14 mm. 



Animal unknown. 



Type in the British Museum. The types of S. Kirki and Huttoni 

 are in the Dominion Museum, Wellington. 



