498 MR. E. S. SALMON: REVISION 
in any way to S. Chrismari, which, as remarked above, I consider 
only a form of S. helicophylia. 
I do not think the present species is a Symblepharis ; the areo- 
lation and shape of the leaf are quite unlike anything found in 
the genus, and also the leaf-base shows an important difference. 
Bescherelle describes this as “e cellulis hyalinis rectangulis 
areolata," but I find a rather different structure. The cells 
towards the nerve are relatively large, rather firm-walled, rect- 
angular, and empty, but at the margin are narrow, short, and very 
thin-walled, forming a more or less evident border (Pl. 26. fig. 37). 
These two kinds of cells are very clearly seen in a transverse 
section of the leaf-base (fig. 38). This structure is just what 
occurs in Syrrepodon circinatus, Schpr. non Mitt. (Besch. Prod. 
Flor. Mex., Mém. Soc. Sei. Nat. Cherb. xvi. p. 172 (1872)); 
and I would point out the close agreement in habit, shape 
of leaf, and areolation of this species with the Grande Comore 
moss. 
S. usambarica, Broth., in Engl. Bot. Jahrb. xx. p. 179 (1895). 
DrisrRIBUTION.— Africa: Usambara (Holst, 1891, no. 115 p-p) 
Through the kindness of Dr. V. F. Brotherus, I have received 
a specimen of this moss, now in the Kew Herbarium. 
It certainly does not, in my opinion, belong to the genus 
Symblepharis. The leaves are comparatively short and broadly 
lanceolate, with opaque, very papillose cells; the fruit has not 
been found. Brotherus remarks on his plant, “ A S. circinata 
Besch. proxima foliis brevioribus, parte basilari late vaginante 
superne dilatata, facile dignoscitur.” Bescherelle’s S. circinata 
from Grande Comore and La Réunion includes, as mentioned 
above, two distinct mosses, and the specific description applies 
best to the specimens from the former locality. 8. usambarica, 
however, very closely resembles the La Réunion plant, from which 
it scarcely differs except in the broader, more vaginant base, 80 
that it appears that Brotherus has accepted this as Bescherelle s 
S. circinata. 
S. perichatialis, Wils, Hook. f. Fl. New Zeal. ii. p. 60 
(1855); Hook. f. Handb. New Zeal. Fl. p. 405 (1807) Hole- 
mitrium perichetialis, Brid. 
S. deasifolia, Wils., in Kew Journ. Bot, ix. p. 292 (1857) 
Holomitrium Griffithianum, Mitt. 
