285 PROCEEDINGS OF THE MALACOLOGICAL SOCIETY. 
In the nearly allied F. chordata, Pfr., I found the same microscopical 
structure as in /. pilula, but the riblets are stouter, cord-like, still 
less equidistant, from 6 to 8 per millimetre, never more. The very 
narrow perforation is partly or entirely covered by the columellar 
reflection. Diam. 4, alt. 3mm. 
2. Framucrina (PHEnAconELIx) PonsonsylI, n.sp. 
Patula pilula (Reeve): Hutton, Trans. New Zealand Inst., vol. xvi, 
p. 161, pl. 1x, fig. K; pl. xi, fig. M (radula and jaw). 
Fruticicola pilula (Reeve): Hutton, Trans. New Zealand Inst., vol. xvi, 
p. 194. 
Phenacoheli2n pilula (Reeve): Hedley & Suter, Proc. Linn. Soc. New 
South Wales, ser. 1, vol. vii, p. 641. | 
Llammulina (Phenacoheliz) pilula (Reeve): Pilsbry, Man. Conch., 
ser. 11, vol. ix, p. 16, pl. iui, fig. 18 (the spire is usually 
more depressed than here shown); also pl. ii, figs. 6, 7 
(jaw and radula). 
Shell small, depressed-globose, moderately umbilicated, obtusely 
angled at the periphery, pale horny with irregular radiate dashes and 
spots of rufous on the upper surface, passing over in zigzag lines at 
the base, sometimes imparting a tessellated appearance to it, and 
extending to the umbilicus; thin, dull. Whorls 43, regularly in- 
creasing, flatly convex, sculptured with numerous arcuate, sub- 
equidistant, thread-like riblets, about 8, rarely 7 or 6, per millimetre. 
Protoconch with numerous fine, microscopic, spiral strise, interstices 
between the riblets microscopically decussated. Suture impressed; 
spire scarcely elevated. Last whorl obtusely angled above the middle, 
not descending in front. Aperture oblique, lunate. Peristome thin, 
sharp, slightly reflexed near the umbilicus, which is quite open, 
slightly perspective, and about one-fifth of the greatest diameter. 
Base convex. Diam. maj. 6, min. 5-°25mm.; alt. 8°25 mm. 
flab.—North Island :—Whangarei; Auckland; Mt. Wellington 
Lava Fields and Hillyer’s Creek, near Auckland; Hunua Range ; 
Ohaupo; Mt. Taupiri; Otaki Gorge; Forty Mile Bush; Wanganui; 
Napier. 
The type, from Mt. Wellington Lava Fields, is in my collection. 
The specimen figured is in the British Museum (Natural History). 
Mr. J. H. Ponsonby, in whose honour the shell is named, was the 
first to point out that the shell which we in New Zealand took for 
Lf’. pilula, Reeve, did not correspond with the type in the British 
Museum, and I am greatly indebted to him for his kind assistance in 
settling the question. 
A nearly allied species is Flammulina (Allodiscus) Mossi, Murdoch 
(ante, p. 162), in which, however, the umbilicus is much narrower. 
Var. unicolor, Suter. 
Phenacoheliz pilula (Reeve) var. unicolor, Suter: Trans. New Zealand 
Inst., vol. xxvi (1894), p. 184. 
fab.—North Island; Mt. Taupiri. 

