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Salmon. — A Monograph of 
limit of the cylindrical form of capsule, and is approached by 
other Andian specimens, in which the cylindrical capsule 
becomes frequently slightly inaequilateral towards the base. 
It is most interesting to find that the same peculiarity occurs 
among the Madagascan plants, where it is well seen in some 
of the specimens of ‘ S. HildebrandtiV (Flora von Central 
Madagascar, nr. 2,098), which bear long cylindrical inaequi- 
lateral and slightly curved capsules. 
Sullivant (80) has recorded ‘S. erythrodontus ’ from the 
Sandwich Islands, ‘ East Maui, north bank of the crater 
Haleakala.’ Muller in his ‘ Bryologia Hawaiica’ (22) has 
remarked with reference to this record, ‘ Muscus suspectissi- 
mus a nobis nunquam visus, probabiliter generi Streptopogon 
alienus.’ I have unfortunately not been able to examine 
the specimen in question, now in the Herbarium of Harvard 
University. 
It must be noted that the size of the areolae of the 
‘ tessellated 5 tubular base of the peristome is variable. The 
areolae are sometimes comparatively large and sharply de- 
fined, as e. g. in the specimens from the Andes of Quito 
(Spruce, Muse. Amazon, et And., nr. 141, in Herb. Kew) (see 
Fig. 10), also in the specimens of ( S. bolivianus' in Muller’s 
herbarium. In other examples the areolae are distinctly 
smaller and much less distinct. It may be mentioned that 
in taking off the operculum from the capsule the exserted part 
of the columella frequently comes away with it. 
The stem as seen in transverse section is composed of one 
or two peripheral rows of thick-walled brownish cells ; the 
walls of the external cells project somewhat, and give a cre- 
nulate outline to the stem-section. The rest of the tissue 
is formed of large polygonal cells with very thin flexuose 
walls, which are very slightly thickened at the angles ; there 
is no ‘central-strand’ (see Fig. 20). The leaf-nerve is com- 
posed of ‘pointer-cells’ (see footnote, p. m) and a single 
dorsal stereid-band ; ‘ companion-cells ’ are absent. The 
nerve is frequently not median in the upper part of the leaf 
(see Fig. 24). The cells of the lamina near the nerve some- 
