768 GASTROPODA. [Pulmonrtta. 



Originally it must have existed in immense numbers, for the land- 

 ward slope of the island is covered with the dead and bleached shells. 

 Maori. Pupu-harakeke. 



Var. novoseelandicus, Pfeiffer, 1862. 



Bulimus novoseelnndicvs, Pfeiffer, Mai. BL. viii, 149 ; M.H. Viv., iv, 83 ; 

 Crosse, J. de Conch., 1864, 128 ; Hector, Cat. Land Moll. N.Z., 20 ; 

 M.N.Z.M., 14. Placostylus bovinus, var. neozelanicus, Pfr. : Hutton, 

 T.N.Z.I., xvi, 190. P. bovinus, var. novoseelandicus, Pfr. : Hedley and 

 Suter, P.L.S. N.S.W. (2), vii, 632 ; Suter, J. de Conch., xli, 237. 

 P. Shongii, var. novoseelandicus, Pfr. : Pilsbry, Man. Conch. (2), xiii, 24. 

 Bulimus bovinus, var. Candida, Crosse, J. de Conch., xii, 1864. Placo- 

 stylus bovinus, var. candidus, Crosse : Hutton, T. N.Z.I., xvi, 190 ; 

 Hedley and Suter, P.L.S. N.S.W. (2), vii, 632; Suter, J. de Conch., xli, 

 237 ; Pilsbry, Man. Conch. (2), xiii, 25. 



Distinguished from the species by the bufi- white inside of the 

 aperture, and the white peristome ; the parietal callus also white. 



Diameter, 31 mm. ; height, 77 mm. (type). 



Type in the K.K. Hof museum, Vienna. 



Hob. North Island : Whangaruru, type (Hochstetter) ; Whanga- 

 rei ; Cape Maria van Diemen ; North Cape. 



Subsp. ambagiosus, Suter, 1906. Plate 48, fig. 15. 



Placostylus Hongii ambagiosus, Suter, J. de Conch., liv, 1906, 253, pi. 8, 

 f. 1-3. 



Distinguished from the species chiefly by the sometimes enormous 

 incrassation of the peristome, the presence of concentric lamellae and 

 sometimes tubercles on the callus uniting the margins, and a more or 

 less distinct parietal nodule ; the outer lip with 2 sometimes very- 

 deep and prominent notches, and the aperture distinctly canaliculated 

 above and at the base. The parietal tubercle is always present, 

 though sometimes inconspicuous. 



Diameter, 33 mm. ; height, 74 mm. ; length of aperture, 27 mm. 

 (type). 



Type in my collection. 



Hob. Cape Maria van Diemen, type (Lady Frances Brown) ; 

 Kaitaia (R. H. Matthews). 



Fam. ACHATINELLID^ 

 Helicteridce, Fischer. 



Animal having the jaw finely striated or ribbed. Teeth of radula 

 with the teeth i oblique rows, with the base narrow, and the reflexed 

 portion with numerous denticles ; or the teeth may be in subhorizontal 

 rows, the central tooth narrow, unicuspid. laterals bicuspid, and the 

 marginals multicuspidate. 



Shell bulimoid, dextal or siuistral. 



