Peristome of long narrow teeth & processes.
K W A [Allison KW], 1964
Supplementary remarks:
W. Bell 600 + 657 (also 621 sent to TFC [Cheeseman TF]
These mosses are identical with my NZ 55 determined by Mr Cheeseman as Rhynchostegium tenuifolium Hedw.
The leaves are finely serrated from base to apex, nerve vanishing about half way
Seta smooth
The leaves in 657 are rather longer & narrower than those of 55 but the cell structure is the same.
[Beckett TWN]