298 Transactions. — Zoology. 



ginecl. It maybe considered as au intermediate form between 

 Phrixgnathus and the subgenus Laoma. 



Amongst the iew specimens none had the animal left in it, 

 and the dentition therefore remains unknown for the present.' 



Phrixgnathus (Laoma) marina, Hutt., from Forty -mile 



Bush, North Island. Plate XXIII., figs. 41, 42. 



Jaw arcuate, with about 24 broad vertical plaits, which 

 are strongly papillate, as is typical of the genus. Both 

 margins are denticulated, the cutting-margin fringed by 

 papillae. 



Radula tongue-shaped, formed by about 110 straight trans- 

 verse rows of teeth, 30 — 1 — 30. 



Central tooth rectangular, nearly three times as long as 

 broad, reflection very short, rounded, with one short cuttmg- 

 point only, the whole covering one-third of the base. 



No laterals to be distinguished. 



Marginals rectangular, a little longer than broad, reflection 

 bicuspid, the inner cutting-point long, the outer short ; last 

 marginals small, broader than long, with two equally-developed 

 short denticles. 



The radula of Ph. nerissa, Hutt., is just the very same. 



Maoriana pseudoleioda, Sut. From Torty-mile Bush, North 

 Island. Plate XXIII. , figs. 43, 44. 



Jaio membranaceous, arcuate, slightly tapering, with faint 

 vertical and one transverse striae. 



Badula tongue-shaped, consisting of about 90 nearly 

 straight transverse rows of teeth, 11 — 4 — 1 — 4 — 11. 



Central tooth rectangular, little longer than broad, reflec- 

 tion tricuspid, median cusp slender, reaching with its rather 

 short cutting-point to the posterior end of the base ; side- 

 cusps small, rounded, no cutting-points seen. 



Laterals broader than the central, but very much the same ; 

 all the cusps stouter ; in the third and fourth the median cusp 

 and cutting-point are slightly bent inwards. 



Marginals much broader than long, with three to four 

 denticles, of which the second innermost is the stoutest ; last 

 marginal small, with one denticle only. 



Maoriana wairarapa, Sut. From Forty-mile Bush, North 



Island. Plate XXIIL, fig. 45. 



Jaw not seen. 



Badula very minute, long and narrow, consisting of about 

 100 slightly-curved transverse rows of teeth, 6 — 4 — 1 — 4 — 6. 



Central tooth rectangular, longer than broad, reflection tri- 

 cuspid, median cusp not much longer than the side-cusps, its 



