458 MR. E. 8. SALMON ON 
(Dickins) named “ B. roseum” by Mitten; these, however, both 
belong to Bryum giganteum. Mitten (8) remarks that B. roseum 
is reported by Dozy and Molkenboer from Japan, “and also 
mentioned by Sande-Lacoste as B. giganteum, Hook.” It seems 
to me, however, more probable that the * B. roseum” of the 
first-named authors was B. giganteum. As the two species are 
frequently barren, and as they often occur of the same size, it 
may be worth while to point out another distinguishing character 
of the leaves besides that of the difference in the marginal teeth 
given by Müller (Syn. 1. 247-248). This is found in the nerve- 
structure of the leaves; in B. giganteum a transverse section of 
the nerve shows, towards the centre, a varying number of very 
thin-walled cells (* begleiter "-cells), and an entire absence 
througbout the nerve of any thick-walled cells; in B. roseum the 
fewer " begleiter ”-cells are always accompanied by a group or 
groups of thick-walled *' stereid "-cells. 
BRYUM PSEUDO-TRIQUETRUM, Hedw.—China: Szechuen, c. fr. 
(Dr. A. Henry, May 1888, no. 5593). A form with the nerve 
more excurrent than usual. 
MsriACEX. 
MNIUM ORTHORRHYNCHUM, Bry. Eur.—China: Tientai Mts., 
2000 ft., Prov. Chekiang, c. fr. & d (Dr. E. Faber, 1889, nos. 3, 
19). 
M. succuLextum, Mitt—Japan (Moseley, * Challenger ’ 
Expedit., April-May, 1875). 
These specimens were so named by Mitten, and are identical 
with Indian examples of the species. They are not, however, 
mentioned by Mitten (8) in his account of the Mosses of Japan, 
and the species has bitherto been recorded only from India, and 
doubtfully from Java. 
M. Trıcnomanes, Mitt.—Manchuria: M. Tsien Mts. (Dr. E. 
Faber, no. 1509); Nank'ang-fu, Kiukiang (Miss Reid). 
M. DECRESCENS, Schimp. MSS., Besch.—The plant described 
under this name by Bescherelle (18. p. 344) is labelled “ W. de- 
currens, Schpr." in Schimper's Herbarium at Kew. 
M. cunvvrtvM, C. AMüll.Chira: on stone, Hupeh, Fang 
(Dr. A. Henry, Sept., no. 6933). 
The plants agree perfectly with authentie examples of this 
