62 HELIX-LAOMA. 



; 



base, unicuspid, marginal teeth twice as broad as the central tooth, 

 bicuspid, the cutting-points growing larger and reaching the poste- 

 rior margin of the base as they approach the margin of the radiila. 

 The last two teeth much broader than long, with rudimentary cusps. 

 (Sut.) 



Phrixgnathus acanthinulopsis SUTER, Trans. N. Z. Inst. 1890, p. 

 92, t. 18, f. 11, a, b, S, T (shell and dentition). 



L. TITANIA Hutton. PL 23, figs. 82, 83, 84. 



Shell globosely conoidal, umbilicated. striated ; pale horny, irregu- 

 larly banded with chestnut. Spire conoidal, rather obtuse ; periph- 

 ery obtusely cariuated ; suture margined ; whorls 5-6, rounded, 

 very finely striated ; umbilicus broad, perspective ; aperture very 

 slightly oblique, subcircular; peristome thin, the margins closely 

 converging; columellar margin not reflected. 



Greatest diameter '14, least '12, height '10 inch. (Hutt.} 

 Differs from P. sdadium in the higher spire and the obtuse keel. 

 (Hutt.} 



Dunedin, S. Island, New Zealand. 



Phrixgnathus titania HUTTON, Trans. N. Z. lust, xvi, p. 177, 198 

 (1883). 



The type specimen is figured. 



L. HAASTI Hutton. PI. 23, figs. 91, 92, 93. 



Shell minute, depressed, smooth, shining, umbilicated; color 

 horny, usually with irregular radiating hands of reddish brown and 

 white. Spire conoidal, depressed; whorls 4}, slowly increasing, 

 rounded, the last subcarinated, obscurely distantly striated ; suture 

 impressed; umbilicus moderate, pervious, showing the penultimate 

 whorl; aperture subvertical, luuately subcircular ; peristome thin, 

 arched, the margins not approaching. 



Greatest diameter '12, least *1, height '07 inch. 



Distinguished by its smooth, shining surface and brown and 

 white bands. Its generic position must remain doubtful until the 

 dentition is known. (Hutt.') 



Mt. Somers, Canterbury, South I., New Zealand, on limestone 

 cliffs. 



Phrixgnathus (/) haasti HUTTON, Trans. N. Z. Inst. xvi, p. 

 177, 198. 



