492 MR. E. 8. SALMON: REVISION 
not quite so broadly elliptic as in the Kew example; the spores 
average 35 u. 
In the large series at Kew I could find no spores intermediate 
in size between Aelicophylla and this variety, and it seemed as 
though the latter might deserve specifie rank ; but in Hampe's 
Herbarium, at the British Museum (Natural History), there is 
a moss named * S. Hookeri, Wils., minor. Sikkim, 11,000 ft. 
(S. Kurz), no. 2331," whieh is exactly intermediate between 
S. helicophylla and the variety macrospora, both in the shape of 
the capsule and size of spores, which are from 20-30 p in 
diameter. The occurrence of this connecting link is very 
interesting, showing, as it does, that even in the size of the 
spores S. helicophylla is a variable species. Such intermediates 
are certainly rare, and their occurrence does not, I think, 
lessen the claim of macrospora to rank as a well-marked 
variety. 
If the foregoing conclusions be accepted, we must look upon 
S. helicophylla, Mont., as a variable species, giving rise to several 
well-marked varieties, and must allow it a wider distribution 
than has been previously accorded to it. The species will stand 
as follows :— 
S. HELICOPHYLLA, Mont. in Ann. Sci. Nat. sér. II. viii. p. 253 
(1837); C. Müll. Syn. i. p. 461 (1849); Mitt. Muse. Austr. 
Amer. p. 48, in Journ. Linn. Soc., Bot. xii. (1869); Jaegr. Adumbr. 
i. p. 73 (1872). 
Didymodon vaginatum, Hook., in Wall. Cat. no. 7571 (1828) ; Hook. 
Ic. Plant. t. xviii. fig. 4 (1837) ; Lond. Journ. Bot. ii. p. 9 (1840); 
C. Müll. Syn. i. p. 462 (1849). 
Symblepharis Oerstediana, C. Müll. Syn. ii. p. 613 (1851) ; Mitt. Muse. 
Austr. Amer. p. 48 (1869) ; Jaegr. Adumbr. i. p. 73 (1872). 
S. Chrismari, C. Müll. Syn. ii. p. 614 (1851); Mitt. Muse. Austr. 
Amer. p. 49 (1869) ; Jaegr. Adumbr. i. p. 73 (1872). 
S. Hookeri et S. dilatata, ex parte, Wils. in Kew Journ. Bot. ix. pp. 292, 
293 (1857). 
Leptotrichum himalayanum, Mitt. Musc. Ind. Orient. p. 12 (1859). 
Dicranella himalayana, Jaegr. Adumbr. i. p. 82 (1872). 
Symblepharis Hookeri, Wils., Jaegr. Adumbr. ii. p. 626 (1879). — 
S. asiatica, Besch. Rev. Bryol. 1891, p. 88, in Ann. Sci. Nat. sér. VII. 
t. 15, p. 50 (1892). 
Dichodontium Hookeri, Par. Index Bryol, in Act. Soc. Linn. Bord. 
xlvi. p. 332 (1893). 
