SuTEK. — 0)1 Nexo Zealand Mollusca. 299 



large cutting-point nearly reaching to the posterior end of the 

 base. Side-cusps with very small cutting-points, one on 

 each. 



Laterals much like the central, but a little narrower, and 

 the median cutting-point reaching beyond the margin of the 

 base. 



Marginals broader than long, the fifth and sixth with a 

 well-developed median j)rojection and denticle ; tridentate, 

 the last very broad and short ; all the denticles coalesced in 

 a slightly-denticulated mass. 



Maoriana hectori, Sut. From Forty- u:iile Bush, North 

 Island. Plate XXIII., figs. 46, 47. 



Jaiv membranaceous, slightly arcuate, ends blunt, with a 

 few distant striae starting from its upper margin. 



Badida tongue-shaped, consisting of about 100 slightly 

 undulating transverse rows of teeth, 10 — 6 — 1 — 6 — 10. 



Central tooth nearly quadrate, reflection tricuspid, median 

 cusp long, reaching with its short cutting-point to the poste- 

 rior end of the base. Side-cusps rounded, with a rudimentary 

 cutting-point on each. 



Laterals very much the same as the central, but somewhat 

 smaller. 



Marginals broader than long; the first one tridentate, the 

 following quadridentate, and the last small and bidentate. 

 The second tooth is best developed. 



Maoriana microundulata, Sut. From Forty - mile Bush, 

 North Island. Plate XXIII., figs. 49, 50. 



Jaxo membranaceous, ends blunt, distantly vertically 

 striated, and the upper margin rather strongly denticulated. 



Badula tongue-shaped, with slightly undulating transverse* 

 rows of teeth, 10 — 4 — 1 — 4 — 10. Teeth larger than in any 

 other species of the genus. 



Central tooth large, rectangular, not much longer than 

 broad, anterior end of the base sinuated, reflection tricuspid ; 

 middle cusp narrow, reaching with its short cutting-point to 

 the posterior end of the base ; side-cusps rather large, pointed 

 on the anterior and rounded on the posterior end, each with 

 a broad, short, blunt cutting-point. 



Laterals almost like the central, but diminishing consider- 

 ably in size towards the marginals ; the fourth lateral with 

 the inner side-cusp and cutting-point longer. 



Marginals broader than long, with rather strong denticles; 

 the last small, with four denticles. 



The radula of this species is distinguished by the relative 

 considerable size of the central and first lateral teeth. 



