•'508 mosses (Gepp). [StereophyUwm 
cataract of the river Cuanza at Condo ; with fr. beginning of March 
1857. No. 95. A laxly crespitose, glistening and intensely green moss, 
closely adhering to shaded rocks in Mata de Pungo ; with fr. middle 
of May 1857. No. 75- Terrestrial, deep green, very widely ca^spitose 
on the banks of rivulets within the presidium, Barranco de Songue ; 
without fr. end of May 1857. No. 91. Common, but rarely producing 
fruit, in damp grottoes by the Casalale brook ; with fr. April 1857. 
No. 92- Deep green, almost turning to black, very widely csespitose 
on moist rocks by the sources of the rivulet in the elevated parts of 
the Barranco de S. Antonio ; without fr. May 1857. No. 94. 
These plants appear to be so closely related as to belong to one and 
the same species, of which No. 93 is the type. Variations in the size 
and shape of the leaves are common to all. The youngest leaves 
usually have their cells plainly unipapillate, while on the older leaves 
the papilla? are seldom conspicuous. No 92, the type Hypnum decolo- 
raus Welw. et Duby, is characterised by its darker colour and slower 
capacity for absorbing water, both of which properties may be due 
to the influence of its place of growth. The species is at once 
distinguished from S. omalosekos by having a seta more than twice 
as long, and theca nearly twice as long. 
3. S. linguaefolium. 
Somalia lingucefolia Welw. et Duby in Geneve, Mem. Soc. 
Phys. XXI. ii. p. 431. t. iii. f. 6 (1872).* 
GrOl/UNGO Ai,t<>. — A bright-green obtuse-leaved moss occurring on 
the sturdy trunks of trees, especially Meliaceae (Entandrcphragma), 
growing in the shaded primitive forests of Serra de Alto Queta, but 
sparingly ; also in Trombeta and Queta Central ; with young and 
mature fr. Dec. 1855 and Aug. 1857 ; also on the older trunks of 
Entandrophragma angolense in the forests of Quibolo ; with fr. May 
1856. No. 170- With Eulcjeimea Breutelii on tree trunks in the 
forests of Queta Central ; July 1855. No. 220, in part. 
This species is nearly allied to S. Baxxeanum C. Muell. (Dusi'n Exsicc. 
No. 7) and to S. leptotapes C. Muell. (Dusun Exsicc. No. G76), both 
from the Cameroons, but is a smaller plant with the apices of its leaves 
more obtuse and rounder and the cell-walls thicker. S. nitens Mitt., 
described in Trans. Linn. Soc. xxiii. p. 51 (18P)()-2), is characterised as 
having its leaves subacute at apex, and appears to have narrower and 
less elliptical leaves (J.c, tab. v. fig. 3). 
4. S. auriculatum Gepp, sp. n. 
Monoicous. A small, corticolous, depressed, glistening plant ; 
stem adhering with brown rootlets, vaguely branched ; branches 
prostrate, complanate, of 2 mm. diam. with their leaves, obtuse ; 
lateral leaves patent, median appressed, all concave, from a 
contracted base longly ovato-lanceolate acute, 1*65 mm. long by 
0-6 mm. wide, with margin more or less infolded on one side and 
serrulate towards apex, sometimes with four or five apical 
denticulations ; nerve slender and vanishing in the middle of the 
leaf ; cells of the basal angles of the leaf quadrate and numerous, 
and forming on one side of the lateral leaves a flavescent sub- 
inflated auricle with laxer cells, upper cells elongate and firm- 
walled, apical longly elliptic, all smooth ; perichsetial bracts 
smaller, acuminate, serrulate; seta 10 mm. long, red, slender, 
curved at apex ; theca sub-horizontal, oval, more than 1 mm. 
