784 GASTROPODA. ? \_Pitlmonatfi. 



Type iii the Canterbury Museum, Christchurcli. 



[Jab. Saddle between the Mokihinui and Lyell Rivers (type) ; 

 eighty to ninety miles south of Collingvv <><><! ; Mount Rochfort. near 

 Westport. 



6. Paryphanta urnula, Pfeifier, 1855. Plate 50, fig. 14-. 



Helix urnula. Ph., P.Z.8., 1854 (1855), 49 ; Conch. Icon., vii, pi. 187, f. 1306 ; 

 M.H. Viv., iv, 8 ; Hector, Cat. Land Moll. N.Z., 12. Paryphanta urnula, 

 i't'r. : Hntton, M.N.Z.M., 22. Rhytida urnula, Pfr. : Button, T.N. Z.I. , 

 \vi, 208. Purtjplianta ;<rmda, Pfr.', Man. (.lunch. (2), i, 128, pi. 26. f. 14 ; 

 Hecllcy and Suter, P.L.8. N.S.W. (1), vii, WO ; Siiter, J. rlc Conch., xli, 

 287. 



Shell rather small, globulaiiy ovate, covered perforate, thin, sub- 

 membranaceous, obliquely furrowed and malleated, a little shining, 

 pellucid, fuscous. Sculpture : Protoconch with fine radiate striae, the 

 succeeding whorls with radial plaits, more or less distinctly malleated, 

 the last whorl with broadly rounded protective ribs and fine dense 

 spiral lines, which are getting obsolete on the base and are absent 

 round the perforation. Colour fuscous, sometimes with a greenish hue, 

 and with faint bands of darker following the direction of the growth- 

 lines ; aperture bluish-white within. Epidermis fairly thick, faintly 

 shining above, polished at the base ; very often the last whorl contains 

 very little calcareous substance, being built up by conchin only. Spire 

 minute, conoidal, obtuse. Protoconch of If whorls, convex. Whorls 3, 

 convex, very rapidly increasing, the last large, subcompressed from 

 behind, periphery convex, base somewhat excavated. Suture rather 

 deep. Aperture oblique, truncatedly oval, within very shining, some- 

 times slightly iridescent. Peristonie simple, obtuse, subinfiexed. 

 margins approximating. Columclla high, oblique, arcuate. Inner lip 

 slightly reflexed and callous above, spreading as a thin bluish-white 

 callus over the convex parietal wall. Umbilicus narrow, partly 

 hidden by the reflection. 



Diameter Maj., 16mm.; rain., 13mm.: height, 9 mm. (type). 

 Diameter Maj., 24 mm. ; min., 19 mm. : height, 17 mm. (large 

 specimen). 



E</(/ calcareous, white. Length, 5 mm. 

 Annual and Anatomy. Murdoch, P. Mai. S., v, 27<>. 

 Radula. Suter, T.N.Z.I., xxiv, 286, pi. 20, f. 1. 

 The animal is blue-black in colour, the anterior portion of the body 

 being darkest. The rugse are irregular, somewhat larger on the neck 

 and sides than on the tail. A minute line-like groove surrounds the 

 foot-margin. The foot is comparatively broad, with the tail acutely 

 pointed and flattened above. The foot-sole is a dirty yellowish-white 

 in the middle area, becoming darker around the margins. The mant!i> 

 has a sharp even margin, which is of a darkish colour, and from the 

 under-side of the mantle project to right and left small fleshy ridges 

 or lappets. The genital pore is behind the right ommatophore, and 

 the orifices of the male and female organs appear to be distinct. 



