DICRANACEAE. 93 
dontium, a genus hitherto unrepresented in New Zealand. It differs from 
most of the northern species, having circinate leaves with the supra-alar cells 
all linear, scarcely widened next the nerve, and the subula sharply and 
densely spinulose at the extreme apex, more remotely toothed below, scarcely 
channelled, obscure, but with the nerve showing as a pale median line, and 
a — marginal series of cells often subpellucid. Mitten’s plant is only 
about 2cm. high; Brown’s specimen, on the other hand, is a fine plant, 
8 cm. high, ‘put otherwise agreeing. 
D. tapes C.M. from Tasmania, the only other Australasian species of 
the genus, is a totally ‘different plant. 
CONTE: —_ (Hampe) agrees very closely in leaf-structure, but 
is known at 0 y the vit -circinate leaves and the inner supra-basal 
cells with Pee porose walls. 
Mesorvus Mitt. apud Hook. f., Handb. N.Z. Fl., p. 461 (1867). 
Mesotus celatus Mitt., op. et loc. cit. 
fais Holomitrium undulatulum C. M. in Hedw., xxxvi (1897), p. 365. 
ery remarkable plant is not inaptly emueibod by Mitten as having 
the ia pee of Symblepharis, creeping stem of Macromitr um, and 
teeth of Grimmia. It is an endemic species, and appears to be confined 
to the southern part of New Zealand. The only other species of the genus, 
M. acutus Mitt., belongs to Australia, the locality unknown. Paris (Ind. 
bryol.) gives also Tasmania, but the authority is very dubious. It is not 
included in either Bastow’s or Rodway’s works on Tasmanian mosses. 
Dicnemon Schwaegr., Suppl. ii, Be 2, i, p. 72 (1826-27). 
Key TO THE SPE 
Leaves nerved to near Ae = ee + . 1. calycinum, 
Leaves nerveless se ae as ae 2. semicryptum, 
1. Dicnemon calycinum (Hock.) Schwaegr., op. et loc. cit. Handb. 
N.Z. Fl., p. 409. [Plate VII, fig. 4 
Syn. calycu 
Hab.—Trees, frequent throughout the Island. It is recorded fro 
oe but I am not clear on what authority (cf. Watts ane Whitelegge, 
us M. Australiens., Pt. i, p. 54). ere are no Australian specimens 
at pee British Museum, nor any at Kew with the oo“ of a scrap 
labelled ‘* Nov. Holl.,” but of exceedingly doubtful origin 
3. Dicnemon semicryptum C. M. in Hedw., xxxvi (1897), p. 364. [Plate 
VII, fig. 5.] 
Syn. os pti 6 Hampe, MS. in herb., et C. M. Gen. Muse. Fr., 
1 (nomen). 
C. Miller ae the leaves of D. calyeinwm as much larger than 
th of D. semicryptum. This is no doubt frequently the case, but 
I do not find it to be at all a reliable character, nor c I fin 
any vegetative characters to separate me sig beyond = e€ ee 
wanting in D. semieryptum, long and strong in D. calyci The leaves 
in the latter may perhaps sed ‘rather more strongly foarte but they 
vary much in this respect, as well as in outline, in both. e fruiting 
characters are, however, cueeuliy speaking, distinct. In D. calycinum the 
