[Head before the Philosophical Institute of Canterbury, 20th August, 1899.]

Plate II.

Sir Walter Buller has kindly allowed me to photograph a perfect shell of this species which was obtained on Mount Rochfort, near Westport, and to add to the description given in the “Transactions of the New Zealand Institute,” vol. xx., p. 43. The greatest diameter is about 2 in. There are five and a half whorls in the specimen, and the angle of spire is 125°. The whole shell is of a yellowish-brown or luteous colour, the brown bands being obsolete. The first whorl is pale, the following ones are darker in colour. The umbilicus is the same as in P. hochstetteri. The aperture is transverse, the columella descending more than in the adult P. hochstetteri, but not so much as in the young of the same species. The peristome is thin, the upper margin oblique, slightly undulated near the suture.

The figures (Plate II.) are rather less than natural size; the lower one is slightly canted to get the light into the umbilicus, so that it does not show the correct outline at the base. This is seen in the upper figure. I have compared this specimen with photographs of the types of Paryphanta gilliesii kindly sent to the Museum by Mr. E. A. Smith, and I find that that species has a much larger umbilicus than P. lignaria, besides being flatter.