292 Transactions. — Zoology. 



The radula of this species differs considerably from those 

 known of the other species of the genus. 



Patula bianca, Hutt. From Forty-mile Bush, North Island. 



Plate XXI., figs. 20, 21. 



Jaw membranaceous, slightly arcuated, not tapering, 

 faintly vertically striated, with a slight median projection on 

 its cutting-margin. 



Baditla tongue-shaped, central part of the straight trans- 

 verse rows somewhat advanced. Teeth, 7 — 4 — 1—4 — 7. 



Central tooth rectangular, longer than broad, reflection 

 tricuspid, the middle cusp nearly reaching to the middle of the 

 base, with a short cutting-point ; side-cusps small, rounded, 

 with a rudimentary cutting-point on each. 



Laterals. — All four very much like the central, but some- 

 what broader and shorter ; the median cusp nearly reaching 

 to the posterior end of the base, and its well-developed cutting- 

 point beyond it. 



Marginals from quadrate to much broader than long, tri- 

 dentate, cutting-points stout ; the tenth tooth with four 

 cutting-points, of which the two outer ones are very small. 

 Last marginal small, bidentate. 



The jaw and radula differ somewhat from the var. montana^ 

 as will be seen by comparing it with the figures given in Trans. 

 N.Z. Inst., vol. xxiii., pi. xvii., figs, k, l. 



Patula anguicula, Eeeve. From Forty-mile Bush, North 



Island. Plate XXI., figs. 22, 23. 



Jaio membranaceous, arcuate, not tapering, with a few 

 vertical and one transverse striae. 



Badula tongue-shaped, formed of about 100 straight trans- 

 verse rows of teeth, 7 — 4 — 1 — 4 — 7. 



Central tooth very little longer than broad, rectangular, 

 with a tricuspid reflection, of which the median cusp with its 

 short cutting-point reaches to the end of the base. The side- 

 cusps are short, rounded, one minute cutting-point on each. 



Laterals quadrate, broader than the central, reflection 

 tricuspid, middle cusp reaching to the posterior margin of the 

 base and its short cutting-point beyond it. Side-cusps sinu- 

 ated, with a short cutting-point each. 



Marginals from quadrate to much broader than long, tri- 

 dentate, the median tooth being the largest. Last marginal 

 minute, bidentate. 



The description and figures are from a specimen which is 

 undoubtedly P. anguicula, whilst that described and figured in 

 Trans. N.Z. Inst., vol. xvi., was to my knowledge a young 

 form of P. hiccinella. The difference between both, however, 

 is not considerable. 



