POTTIACEAE., 
I was at first disposed to think that Brown had been misled, in part at 
least, by the figure in the Bryol. Britannica, which shows the gemmae slight] 
stipitate ; on falling off, however, the gemmae lose the single-celled stalk 
(cf. Correns, Vermehr. der Laubmoose, figs. 45-50) and become subspherical. 
at Kew, however, somewhat nied matters, ee sii from Sealer’s 
Cove, Victoria (F. Miiller), showed the sporophyte very similar to that of 
z laevipila, while the leaves agreed exactly with 7. papillosa. The capsules 
were operculate, and I not examine the peristome. ere was one 
obvious difference—viz., that the seta twisted to the right, not to the left 
as in T. laevipila and most species of Syntrichia.* 
When I examined the New Zealand fruiting specimens, “ 27, N.Z., Mr. 
Travers, 1860,’ however, I noticed that the seta was a little longer (1-5 om. 1; 
and also that it twisted in the reverse direction—7. e., to the left. The same 
was the case with the specimens “ N.Z., Prov. Canterbury, Sinclair & Haast, 
1860-1.” On examination of the leaves of Travers’s plant it was at once 
evident that one had to do with an entirely different thing from 7. papillosa. 
The gemmae appeared to be identical, but the leaf-structure was entirely 
different ; the le. eaves, in fact, di ered very little, if at all, from those of 
small, and in the younger leaves obscure, a single row at piece ually 
eing smaller, compressed and transversely elliptical, forming a rather 
conspicuous border here and there, but not constantly. The peristome-tube 
was much longer than the free part of the teeth, whereas that of the Sealer’s 
Cove plant is described by Mitten as eristomii parte tertia inferiore 
tubulosa.”” The New Zealand fruiting plants in fact, belong to a gemmiparous 
form or variety of T. princeps, and t as no dou bt the plant taken by 
R. Brown for a as epee which must be “tookal upon at present as sterile 
only in New 
T. pape pila is easily known, apart from the gemmae, by the very 
concave, wide spathulate leaves with incurved margins, yellowish nerve 
papillose at ba ak and excurrent in a yellow flexuous fae and by the 
very large cells (18-27 ,). 
It appears to be uncommon in New Zealand, and is perhaps only 
known from the North Island. 
* It is necessary to call attention to the fact that botanists use a terms in contrary 
senses, according to whet? the oe -: supposed to be viewed from within or without. 
If viewed from without and the nearer side ascends to the right, the farther side is 
obviously twisting to the left, and see versa. Viewed from within, a spiral, whether 
: the same direction on all han and it appears to me, 
therefore, more free fro: reteset y to assume this standpoint, sad T use the term in that 
sense. is, however, pielieis y used with the reverse intention—i.¢., the term “ _ 
the right” implies that the ade oe the spiral nearest to the spectator, viewing it 
bes outside, twists to the right. In view of ee nena co would probably be better 
to drop these eee altogether and use and “ negative,” 
** positive ” spiral being one that turns in the “retion of of the hands of a wa cece 
pagina? clie Hd tines urns in the reverse directio 
