Gibbitla.] GASTROPODA. 137 



2. Gibbula fulminata, Hutton, 1873. Plate 38, fig. 22. 



Chrysostoma fulminata, Hutt., C.M.M., 36. Gibbula fulminata, Hutt., Man. 

 Conch. (1), xi, 216, pi. 43, f. 14-16; Suter, P. Mai. S., ii, 276. Mar- 

 garita fulminata, Hutt., ,T. do Conch, 1878, 34. 



Shell small, globose-conoidal, perforate, solid, nearly smooth.. 

 Sculpture consisting of very fine distant spiral strise, often obsolete, 

 but always distinctly visible on the base, crossed by fine and close 

 growth-lines. Colour pink, orange, purplish, or olive-brown, generally 

 with a series of white blotches alternating with darker ones below 

 the sutures, a girdle of white blotches around the periphery and often 

 around the umbilicus ; the intervening spaces irregularly strigate 

 with darker zigzag streaks or unicoloured. Epidermis thin, slightly 

 shining. Spire short, the same height as the aperture, outline convex, 

 apex blunt. Protoconch depressed conoidal, of 2 slightly convex 

 smooth whorls. Whorls 4^ to 5, convex, the last large and angled 

 at the periphery ; base convex. Suture linear. Aperture oblique, 

 rounded quadrate, iridescent and faintly lirate within. Outer lip 

 sharp, strengthened inside by a white callus. Columella subvertical, 

 concave, slightly straightened in the middle. Inner lip spread as a 

 white shining callosity into the umbilical funnel. Umbilicus small, 

 nearly covered. 



Diameter, 7-5-8 mm. ; height, 7-5 mm. 



Dentition unknown. 



Jaws present. 



Type in the Dominion Museum, Wellington. 



Hob. Chatham Islands (type) ; Hauraki Gulf to Cook Strait, 

 not common. 



3. Gibbula micans, Suter, 1897. Plate 33, fig. 9. 



Gibbula micans, Suter, P. Mai. S., ii, 279, fig. in text. 



Shell very small, subperforate or imperforate, conical, slightly 

 iridescent, shining. Sculpture consisting of fine spiral lirse, about 15 

 on the penultimate whorl, growth-lines inconspicuous. Colour light 

 yellow with radiate oblique broad streaks of dark brown, the intervals 

 with a few light-brown dots ; base tessellated with yellowish and 

 brown. Epidermis very thin, the pearly inner layer shining partly 

 through it. Spire conic, its height greater than that of the aperture, 

 sides very slightly convex. Protoconch small, acute, of 2 convex, 

 light-brown, and finely spirally striate whorls. Whorls 6, flatly convex, 

 the last keeled at the periphery ; base convex. Suture very little 

 impressed. Aperture slightly oblique, subquadrangular ; interior 

 silvery and finely lirate. Outer and basal lip sharp, angled where they 

 meet, margined with a white br- d. Columella subvertical, slightly 

 arched, with a slight swelling in the middle. Umbilicus partly or 

 completely covered by the columella expansion ; umbilical tract slightly 

 impressed, white. 



