Root-stock creeping. Leaves solitary, 1–2 inches long, erect, setaceous. Sporocarpium globose, 2-valved, 2-celled; carpopodium ¼ inch long, erect; raphe elongated; micro-sporangia numerous, pyriform, each containing 20–30 microspores; macro-sporangia 20–25, ovoid; macrospores globose, or globose-ovoid, regular, not constricted.

Hab.: South Island: Lake Lyndon and Lake Pearson, Canterbury. Alt., 2,800 feet. J. D. Enys and T. Kirk.

In general appearance our plant resembles P. globulifera, L., differing externally in the 2-valved sporocarp, the longer carpopodium, and essentially in the non-constricted macrospores. It appears to be closely allied to P. novæ hollandiœ, A. Br., from which it differs in the 2-valved sporocarp, erect carpopodium, and lesser number of macrospores.

A species of Pilularia was detected at Whangape Lake, Waikato, by Professor Hutton and myself, in 1869, but the specimens were too imperfect to admit of identification.

Description of plate xxix.

All magnified.