668 GASTROPODA. [Pulmonala. 



Hob. North Island : Whangarei (Musson) ; Waitakerei Range 

 (H. S.) ; Little Barrier Island (R. Buddie) ; Motutapu Island (A. 

 Suter) ; Waiheke Island (H. S.) ; Mount Wellington lava-fields, type 

 (H. S.) ; Hillyer's Creek (Musson) ; Hunua Range (Major Broun) ; 

 Tuakau ; Ohaupo ; Mount Taupiri (Urquhart) ; Forty-mile Bush 

 (H. S.) ; Otaki Gorge (Preston) ; Wanganui (R. Murdoch). 



Remarks. The species resembles Allodiscus Mossi. Murdoch, which, 

 however, has a much narrower umbilicus. 



Var. unicolor, Suter, 1894. 



P. pilula, Reeve, var. unicolor, Suter, T.N.Z.I., xxvi, 134. 



Shell the same as in the species, uniformly light brown, without 

 any colour-markings. 

 Type in my collection. 

 Hah. Mount Taupiri (A. T. Urquhart). 



6. Phenacohelix Stokesi, E. A. Smith, 1884. Plate 26, fig. 9, a, b. 



Helix (Patula) Stokesi, Sm., P.Z.S., 1884 (6, v), 275, pi. 23, f. 17-176 ; Man. 

 Conch. (2), iii, 262, pi. 22, f. 48-50. Patula Lucetta, Hutton, T.N.Z.I., 

 xvi, 162, 192. Helix (Patula) Lucetta, Hutt., Man. Conch. (2), iii, 22, 

 pi. 3, f. 7-9. Charopa Lucetta, Hutt. : Hedley and Suter, P.L.S. N.S.W. 

 (2), vii, 654. Endodonia (Charopa) Lucetta, Hutt. : Suter, J. de Conch., 

 xli, 268. Flammulina (Phenacohelix) Lucetta, Hutt. : Murdoch, P. Mai. S., 

 iii, 1899, 323. 



Shell depressed, moderately umbilicated. thin and fragile, with fine 

 costse, translucent, not shining. Sculpture consisting of numerous 

 arcuate radiating retractive thread-like riblets, about 5 per milli- 

 metre, on the post -nuclear whorls ; interstices with fine growth-lines, 

 decussated by exceedingly fine crowded microscopic spiral lines, 

 extending over all the whorls, but very indistinct on the embryonic 

 whorls. Colour pale yellow, irregularly spotted and variegated with 

 reddish subradiating markings above, and dotted and streaked beneath 

 with a lighter tint. Epidermis thin and dull. Spire depressed conoidal, 

 its height a little more than half that of the aperture. Protoconch of 

 1| whorls, smooth and glossy. Whorls 6, convex, slowly increas- 

 ing, periphery of last whorl obtusely angled or shouldered above the 

 middle ; base flatly rounded. Suture deep. Aperture obliquely lunate. 

 Peristome thin, straight. Outer lip acutely convex ; basal lip more 

 broadly rounded. Columella very short, subvertical, arcuate. Inner 

 Hp somewhat callous and very slightly reflexed above. Umbilicus 

 moderate, deep and perspective, about one-fourth of the greatest 

 diameter. 



Diameter Maj., 7-5 mm. ; min., 6-5 mm. : height, 4mm. (type). 



Animal and Anatomy. Murdoch, P. Mai. S., iii, 323, pi. 16, f. 12-14. 



Animal having the characteristic suprapedal grooves, a narrow 

 foot, and caudal mucous pore with small papilla. 



