+ Se a PR :. “REVUE BRYOLOGIQU 
floral continuity between the Himalayan ranges of Central Asia 
and the Central European Alps. But the relationships of the species 
give absolutely no support to this view. All the four species in 
Northern India of Distichophyllum (as well as 2. Maibaræ in 
Japan) have the leaf form and areolation which are peculiar to 
_ the bulk of the species of this genus, viz, broadly spathulate, 
_ flattened, scarcely concaveé leaves, with rounded-hexagonal 
areolation, becoming distinctly smaller towards the leaf apex and 
with somewhat firm, not to say incrassate cell-walls. In its very 
concave leaves, and lax, thin-walled cells, scarcely altered towards 
: _ apex, the only species to which it is at all nearly related are two 
or three natives of Fuegia and the neighbouring islands, especially 
D. flaccidum (Hook. f. and Wils). Mitt , and D. nigricans Besch. ; 
_ and the recently described D. cavifolium Card. ; all of which 
-_ however differ from it in a marked degree. AI that can be said is 
* that they constitute, within a small geographical area a small well 
. marked group, to which our present species is decidedly more 
closely related than to any others of its congeners. Its geogra- 
phical position is therefore far more remarkable than that of the 
other European members of the Hookeriaceæ. Æookeria lucens Sm. 
has a wide distribution and several congeners in the Northern 
hemisphere ; 4 lætewvrens H and T. in its British stations is but 
an outlier from the Atlantic Is., its headquarters ; Daltonia 
 splachnoides has a very similar distribution to that of 4. lætevirens, 
but it hasalso several near relatives in northern India ; and moreo- 
= ver the extension even of a tropical or subtropical moss to such a 
_ station as the Southwestern shores of the British Is., subject to 
. an insular climate and to the warm moist influences of the 
Atlantic Gulf Stream, is à very small problem in geographical 
distribution compared with that set by an isolated moss in an 
elevated valley on the north side of {he main chain of the Alps in 
Central Europe with its only near allies confined to the remotest 
limits of continental area of the Southern hemisphere. 
 DisTICHOPHYLLUM CARINATUM Dixon and Nicholson, sp. nov. Lœte 
virens, mollissimum, cæspites depressos in muscineis variis cres- 
madefactus flaccidissimus, siccus pro more firmus, fragilis ; in 
_sectione rotundus, cellularum homogenearum magnarum, parie- 
 tibus tenuibus, compositus, sine fasciculo centrali ; irregulariter 
ramosus, ramis brevibus, obtusis. Folia 6-seriata, hand disticha, 
- sub-conferta, erecta subjulacea, siccitate sub-crispata, 1 —41,5 mm. 
. vel breviter acuminata, apiculo sæpe incurvo ; f. in parte inferiore 
profunde cymbiformia, carinata, apicem versus planiuseula, mar- 
centes formans. Caulis repens, gracilis, brevis, vix 2 em. metiens: 
 longa, 0.5 — 0.75 mm. lata, late oblongo-ovata, subito apiculata 
