SUTER : ON MOLLUSCA FROM NEW ZEALAND. 27 



the converging margins of the peristome. In young specimens the 

 umbilicus is open, but very narrow. Operculum not seen. Diam. 3-5, 

 height 3-5 mm. 



Hah. — Stewart Island. 



The species is distinguished from the type, P. micans, A. Adams, 

 by the absence of radiate riblets, the discontinuous peristome, and the 

 closed umbilicus. Type in my collection. 



13. Leptothyea eldotuata, Hutton, n.var. immaculata. 

 Distinguished from the typical form, of the species in being larger, 



having more numerous cingula, and no colour-markings at all. My 

 specimens (dead shells) are white. Diam. 4, height 2-5 mm. 



J^ab. — jSear the Snares Islands, in 50 fathoms (Capt. Bollons). 

 Type in my collection. 



14. COCCDLINA CRATICULATA, U.sp. PI. II, FigS. 15, 16. 



Shell small, thin, oval, the sides subparallel, elevated. Sculpture 

 consisting of subequal, close, distinct concentric grooves, reticulated 

 by radiate grooves which are slightly slanting to the left on the 

 anterior slope, the surface being cut up into series of squarish granules ; 

 the summit having only concentric sculpture. Colour yellowish-green. 

 JS'ucleus spiral, smooth, small, evidently deciduous, very little within 

 the posterior margin. Posterior slope short, steep, concave ; anterior 

 slope long, regularly rounded. Inside light-green, shining. Length 

 2-8, breadth 1-8, height 1-2 mm. 



Hah. — Dusky Sound, in 30 fathoms (R. Henry) ; a single specimen. 



The subparallel sides and prominent reticulate sculpture distinguish 

 this species from C. Tasmanica, Pilsbry. Type in my collection. 



15. CoCCULINA COMPRESSA, U.Sp. PI. II, FigS. 17, 18. 



Shell small, thin, laterally much compressed, the sides parallel, 

 anterior and posterior end raised, navicular, the summit anterior and 

 considerably elevated. Sculpture consisting of fine, rather distant 

 and indistinct radiate striae, crossed by concentric growth- lines. Colour 

 white. jSTucleus minute, resting on the narrowly elevated summit, 

 situate at the anterior two-fifths of length. Anterior and posterior 

 slope straight, side-slopes lightly convex. Margin sharp, smooth; 

 interior white. Length 5, breadth 2, height 2-8 mm. 



Hah. — Flat Point, East Cape ; one specimen. Type in the collection 

 of Miss M. K. Mestayer, Wellington. 



16. CoCCULINA CLYPIDELL^FORMIS, U.Sp. PI. II, FigS. 19, 20. 



Shell minute, having the shape of a Clypidella, i.e. saddle-shaped, 

 the sides descending, and the anterior and posterior margin slightly 

 elevated; thin, translucent, smooth, apex slightly posterior. Sculpture 

 consisting of concentric growth-lines only ; they are fine and micro- 

 scopic on the upper half, more conspicuous and irregular towards the 

 base. Colour white. In the young shell the nucleus is minute, 

 globose, and polished ; adult shells have usually lost it. The summit 

 is very little behind the middle in the adult, roundish shell, but nearly 

 at the posterior third in the young, more oval shell; it is slightly 



