Tornatina.] GASTROPODA. 525 



1. Tornatina biplicata, Suter, 1909. Plate 22, fig. 28. 



Tornatina biplicata, Sut,, P. Mai. S., viii, 1909, 255, pi. 11, t. 9. 



Shell small, cylindric, mucronate, thin, smooth, with a sharp 

 columellar plait and a broadly rounded fold below it. Sculpture : 

 The perfectly smooth surface shows only indistinct growth-lines. 

 Colour white. Spire slightly depressed, the nucleus raised above the 

 level of the body-whorl. Protoconch papillary, rather small, tilted. 

 Whorls 4, sharply angled above, the last subcylindrical, slightly de- 

 scending ; base rounded. Suture channelled. Aperture vertical, very 

 narrow above, much widened below. Outer lip thin, sharp, consider- 

 ably arched forward at the middle, convex above and at base. Colu- 

 mella with a very oblique narrow and sharp plait at the junction with 

 the parietal wall, twisted below, forming a very distinct broadly 

 rounded fold. Inner lip spreading narrowly and thinly over the 

 lightly convex parietal wall. 



Diameter, 2 mm. ; height, 3-8 mm. 



Animal unknown. 



Type in my collection. 



Hob. Lyall Bay, Cook Strait (A. Hamilton). 



2. Tornatina Charlotte, Suter, 1909. Plate 22, fig. 29. 



Tornatina Charlottce, Sut., P. Mai. S., viii, 1909, 256, pi. 11, f. 10. 



Shell small, oblong, thin, smooth, with projecting nucleus, and 

 distinct columellar fold. Sculpture consisting of fine curved growth- 

 lines only. Colour white. Spire depressed, almost flat, the nucleus 

 only rising above the last whorl. Protoconch papillary, tilted, sinistral. 

 Whorls 4, angled above, the last nearly as high as the shell, angularly 

 rounded above, slightly narrowed at the base, sides straight. Suture 

 channelled. Aperture high, narrow above, widened below. Outer lip 

 thin and sharp, its edge arched forward at the middle, narrowly con- 

 vex above, broadly and regularly rounded at the base. Columella 

 vertical, slightly arcuate, with a distinct broad fold below, which has 

 a lightly impressed median groove ; at the junction with the parietal 

 wall a blunt angle is formed. Inner lip thin, indistinct. 



Diameter, 1-6 mm. ; height, 3-1 mm. 



Animal unknown. 



Type in my collection. 



Hab. Queen Charlotte Sound, in 16 fathoms (Captain Bollons). 



3. Tornatina Cookiana, Suter, 1909. Plate 22, fig. 30. 



Tornatina Cookiana, Sut., P. Mai. S., viii, 1909, 256, pi. 11, f. 11. 



Shell small, oblong, with slightly raised spire, thin, white, smooth. 

 Sculpture consisting of very fine dense curved growth-lines only. 

 Colour white. Spire raised, conoidal, one-fifth to one-sixth the height 

 of the aperture. Protoconch papillary, tilted, sinistral. Whorls 3J, 

 slowly increasing and descending, sharply angled above, the last 



