SuTER. — On New Zealand Mollusca. 293 



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



Plate XXL, figs. 24, 25. 



Jaio thin and fragile, slightly arcuate, not tapering, with 

 strong distant vertical striae. Both margins smooth. A faint 

 indication of a median projection on the cutting-margin. 



Badula tongue-shaped, consisting of about 80 shghtly 

 curved transverse rows of teeth, 9 — 5 — 1 — 5 — 9. 



Central tooth rectangular, longer than broad, tricuspid, 

 median cusp long, its very short cutting-point extending to the 

 posterior end of the base. Side-cusps sinuated, with a short 

 cutting-point on each. 



Laterals. — The first three show no difference from the 

 central, the fourth is more slender, the median cusp with a 

 longer cutting-point, extending very little over the next row 

 of teeth. The cutting-point on the inner side-cusp stouter. 

 The fifth lateral is slightly rhomboidal, the median cusp 

 shorter, but its cutting-point longer and stouter, the inner 

 cutting-point still more developed. 



Marginals. — The first ones almost quadrate, the outer ones 

 broader than long. Three to four cutting-points, of which the 

 second on the inner side is the longest. Last marginals small, 

 unidentate. 



Patula colensoi, Sut. From Forty-mile Bush, North Island. 



Plate XXL, figs. 26, 27. 



Ja7o arcuate, very thin and fragile, not tapering, with a 

 faint median projection on the cutting-margin ; distantly and 

 faintly striated. 



Badula tongue-shaped, covered with about 90 trans- 

 verse rows of teeth, straight in the middle, slightly bent for- 

 wards towards the margins. Teeth, 13 — 4 — 1 — 4 — 13. 



Central tooth large, almost quadrate, sinuated at the 

 anterior end ; reflection tricuspid, median cusp as long as the 

 base, and its short cutting-point reaching beyond it ; side- 

 cusps extending over one-third of the base, a small cutting- 

 point on each. 



Laterals shorter than the central, quadrate, reflection 

 much the same as in the central, tricuspid, the median cusp a 

 little shorter. 



Marginals tridentate, the head of the first ones irregularly 

 shaped, the others much broader than long, with long slightly- 

 curved teeth, of which the external one is short. Last marginal 

 small, unidentate. 



Patula varicosa, Pf. (=P. timandr a, 'H.utt.). From Eiccarton 

 Bush, South Island. Plate XXIL, figs. 28, 29. 

 Jaw membranaceous, very fragile, slightly arcuate, with 



faint and distant vertical stria?. Both margins smooth. 



