308 MOSSES (Gepp). [Stereopkyllvm 



cataract of the river Cuanza at Condo ; with fr. beginning of March 

 1857. No. 95. A laxly csespitose, 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 csespitose 

 on the banks of rivulets within the prassidium, 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 caaspitose 

 on moist rooks by the sources of the rivulet in the elevated parts of 

 the Barranco de S. Antonio ; without fr. May 1867. 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 papillse are seldom conspicuous. No 92, the type Hypnum decolo- 

 rans 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. 



Homalia linguoefolia Welw. et Duby in Geneve, M6m. Sec. 

 Phys. XXI. ii. p. 431. t. iii. f. 6 (1872). 



&OLUXGO Alto. — A bright-green obtuse-leaved moss occurring on 

 the sturdy trunks of trees, especially Meliacese (Entandrophragma), 

 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 

 Enlandrophragma angolense in the forests of Quibolo ; with fr. May 

 1856. No. 170. With Eulejeunea Breutelii on tree trunks in the 

 forests of Queta Central ; July 1855. No. 220, in part. 



This species is nearly allied to S. Basseanum C. Muell. (Dusen Exsicc. 

 No. 7) and to S. leptotapes C. Muell. (Dusen Exsicc. No. 676), 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 (1860-2), is characterised as 

 having its leaves subacute at apex, and appears to have narrower and 

 less elliptical leaves (I.e., tab. v. fig. 3). 



4. S. aurieulatum 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; perichretial bracts 

 smaller, acuminate, serrulate; seta 10 mm. long, red, slender, 

 curved at apex; theca sub-horizontal, oval, more than 1 mm! 



