MOSSES OF NEW ZEALAND. 441 
different from that of the Van Diemen's Land specimen; the leaves are 
frequently shortly hair-pointed. I should have little doubt that this is the 
C. insititius of Hook. f. & W., from a study of original specimens as mentioned 
above; and it appears quite likely thatit may have been a comparison of this 
plant with C. iusititius that led Mitten to suggest the identity of that species 
with the Dicranum clavatum of В. Brown. 
The type plant of Schwaegrichen’s Herbarium is, however, quite a different 
thing. It is at once marked by its large, very distinct auricles, formed of 
suddenly enlarged dark brown alar cells. The presence of these auricles is at 
least suggested by Schwaegrichen’s fig. 3, but they are not indicated in fig. 4, 
which represents the areolation of the lower part of the leaf on an enlarged 
scale. It is clear, however, that, intentionally or not, the supra-basal cells 
alone are figured, the leaf having been torn away, as frequently happens, 
leaving the alar cells behind. This has no doubt led to the supposition on the 
part of writers who only knew R. Brown's species from the description and 
from Schwaegrichen’s figures, or from specimens wrongly distributed under 
that name, that C. clavatus was one of the species lacking distinct auricles. 
This is confirmed by the tact that in the ‘ Handbook of the New Zealand 
Flora? the descriptions of C. appressifolius, Mitt., and С. clavatus (R. Br.), 
whieh were to all intents and purposes drawn up by Mitten, omit all mention 
of auriclar cells for the latter, while they are attributed to C. appresszfolius. 
The nerve is about Z the width of the leaf above the auricles ; I have not 
made a transverse section, but from a careful observation of the surfaces 
it is clear that the ventral cells are rather narrow, and. the dorsal smail and 
somewhat inerassate, and certainly more or less lamellose. А very few of the 
leaves show a short hair-point. The upper areolation of the expanded part 
of the lamina is obliquely rhomboidal and distinctly incrassate; passing lower 
in the leaf the cells become more rectangular, the bulk of them, however, 
remaining more or less short and incrassate—in fact Schwaegrichen’s figure 
represents them fairly well, although I have not found them so regular as 
there depicted,—while the supra-basal margin shows a row or two of more 
elongate and probably less inerassate cells. — This, however, is extremely 
narrow and indistinct : it is in some measure, at any rate, and possibly almost 
entirely due to erosion with age ; and at the most it is entirely alien to the 
broad border of narrow, linear, hyaline cells which obtains in the species 
with а supra-basal area of thin-walled, hyaline tissue, such as C. introflecus 
and C. insititius. 
The two stems shown on the sheet of the type specimen of D. clavatum are 
about 1-14 inches high, with the leaves somewhat interruptedly comose, so 
that in the dry state the stem would no doubt under natural conditions 
take the clavate form suggested by the name. This is, however, the case 
