SUTER : ON MOLLUSCA FEOM NEW ZEALAND. 41 



spirals, the second with a median spiral and one below it, the third 

 with an additional fine spiral thread upon the shoulder, increasing to 

 two on the following whorls ; the last whorl with a double keel 

 bounding the base, which is finely spirally striate ; the spiral sculpture 

 reticulated by radiate, subequidistant, straight threads, which do not 

 extend upon the base ; interstices microscopically reticulated. Colour 

 white. Spire elevated conic, much higher than the aperture, apex 

 blunt, outlines straight. Protoconch with the smooth nucleus almost 

 completely immersed in the spire. Whorls 5^, regularly increasing, 

 the upper whorls distinctly shouldered, the last more convex ; base 

 flat. Suture impressed. Aperture rotund, vertical, effuse at the base 

 towards the columella. Outer lips simple, dentate by the sculpture. 

 Columella vertical, slightly arcuate, rounded, very little expanded. 

 Diam. 1-2, heiglit 2-5 mm. 



Mab. —Kam-dld Gulf (H. S.). 



The Australian M. decorata, Hedley (Mem. Austr. Mus., vol. iv, 

 part 6, p. 352, fig. 75), is an allied species, though larger and having 

 a different protoconch. Type in my collection. 



EXPLANATION OF PLATES II AND III. 

 Plate II. 



Fig. 1. Monilea semireticulafa, n.sp. 5 x 3'2mm. 

 Figs. 2, 3. Liotia solitaria, n.sp. 2*75 x 1 mm. 



,, 4, 5. L. serrata, n.sp. 2*5 x 1 mm. (Fig. 4 young, Fig. 5 adult shell.) 

 Fig. 6. L. rotula, n.sp. 1-7 x 1mm. 

 Figs. 7-9. Cyclostrema eumorpha, ti.b^. 1-7 x l'3mm. 



,, 10, 11. C. lissum, n.sp. 1 x •6 mm. 



Fig. 12. Gyclostremella Neozelanica, m.s^. 2 x •7 mm. 



,, 13. Cirsonella densilirata, n.s^. 2^25 x 1^75 mm. 



,, 14. ■ PseudoUotia iinperforata, n.STp. S'5 x 3^5 mm. 



Figs. 15, 16. Cocculina craticulata, n.sp. 2^8 x P8 x 1^2 mm. 



,, 17, 18. C. compressa, n.sp. 5 x 2 x 2-8 mm. 



,, 19, 20. C. clypidellcefonnis, n.sp. 2^8 x 2-5 x 2-2 mm. 



Fig. 21. Rissoa riifoapieata, n.sp. 1^9 x 4 mm. 



,, 22. R. exserta, n.sp. 1^3 x 2*2 mm. 



,, 23. R. foliata, n.sp. ^8 x 2 mm. 



,, 24. Rissoina lubrica, Suter. •S x 1^7 mm. 



,, 25. Rissoa lampra, n.s]). -8 x 1-5 mm. 



,, 26. R. roseocincta, n.sp. ^9 x 1^6 mm. 



,, 27. R. atomiis, n.sp. 1 x 1^25 mm. 



,, 28. R. verectmda, n.sp. 1^25 x 2 mm. 



,, 29. R. porcellana, n.sp. 1'3 x l-8mm. 



Plate III. 



Fig. 30. R. Stewartiana, n.sp. 1^25 x 1^9 mm. 



,, 31. R. infecta, n.sp. 1-1 x 1^6 mm. 



,, 32. Scrobs Hedleyi, n.sp. •^ x 1^2 ram. 



,, 33. Anabathron gradatum, n.sp. \-& x 2^25 mm. 



,, 34, Rissoina fuscozona, n.sp. 1^7 x 2'8mm. 



,, 35. li. rufolactea, n sp. 1^5 x 3'3mm. 



,, 36. Omaloyyra fusca, n.sp. 1 x •3 mm. 



Figs. 37, 37«. 0. bicarinata, n.sp. 1'5 x -5 mm. 



Fig. 38. Bittiiim retifermn, n.sp. 1 x 3^2 mm. 



,, 39. B. vitreum, n.sp. 1^8 x 4^2 mm. 



