304 MOSSES (Gepp). [Isopterygivm 



very short or obsolete ; cells elongate, very narrow, witli firm 

 flavid walls, basilar cells lax, alar two upon two subquadrate, 

 lax; perichsetial bracts erect, lanceolate, longly acuminate, 

 serrulate; seta 15 mm. bigh ; tbeca subhorizontal, ovoid, with a 

 short rugulose neck ; endostome processes subperforate, cilia one 

 or two interspersed ; operculum obliquely conic, shortly rostrate. 



HuiLLA. — Terrestrial or on the base of old trunks in the forests of 

 LeguminoscB, called " Matas de Panda " ie. Brachystegta and Berlinia, 

 between LopoUo and Lake Ivantala, collected during the flight ; with 

 fr. end of Feb. 1860. No. 45. 



This species resembles /. Antunesii Broth, in Engl. Bot. Jahrb. 

 XXIV. ii. p. 264 (1897), gathered in Huilla, in the imbricated arrange- 

 ment of its leaves, but is a smaller and much more slender plant with 

 a short-necked theca. 



2. I. Dubyi Gepp, sp. n. 



Antoicous. Plant rather robust, widely and laxly csespitose, 

 flavescent-green, depressed. Stem 5 to 6 cm. long, creeping, laxly 

 pinnately branched, with homomallous leaves ; branches 7 to 

 13 mm. long, usually simple, very compressed, with rather dense 

 foliage, diameter with the leaves 2'5 mm., obtuse. Rameal leaves 

 very complanate, widely divergent, rather hollow, obliquely ovato- 

 lanceolate, shortly acuminate, with margins a little recurved, 

 quite entire or at the apex very minutely serrulate or denticu- 

 late; nerves two very slender, i the length of the leaf; cells 

 elongate (10 by 0'75 /x.), basilar lax ; perichsetial bracts erect, 

 lanceolate, longly acuminate, minutely serrulate above, lower 

 cells lax, basal cells brown; seta 14 to 15 mm. high, yellowish- 

 red ; theca horizontal, oval, subincurved, with mouth oblique, 

 neck short rugulose ; processes of endostome subperforate, cUia 

 solitary ; operculum convex, shortly rostrate. 



PuNGO Andongo. — A very pretty and not uncommon moss, yellow- 

 green, or bright-gold in drier situations, widely csespitose on stones and 

 moist earth by rivulets and springs in the woody parts of Barrancos 

 de Mata de Pungo ; with fr. beginning of May 1867. No. 97. 



This species bears some resemblance to Hypnxim leucophanes Hampe 

 {Plagiothecium C. Muell. ; Isoptenjgmm Jaeg. et Sauerb.) in its foliage 

 but has wider leaf-cells. 



Allied to the preceding species are the following numbers : — 

 Pungo Andongo.— In company with Camjjylopus liorrklus (Welw. 

 No. 76), Barranco de Pedra Songue ; with fr. April 1857. No. 77. 

 Within the prassidium on shady ground near Caghuy, with unripe fr. ; 

 and ou moist ground in rocky places near Caghuy, not far from 

 the prsesidium, sterile ; March 1857. No. 110. A yellow-green moss 

 with bright-purple fruit-stalks, common, but seldom fertile, on the 

 most deeply shaded ground in the primitive woods of the island 

 Calemba ' in the river Ouanza not far from Quisonde ; with fr. 

 March 1857. No. 111. A widely csespitose, humble, creeping moss, 

 ^ ^^^r,F°. ^° marshy woody places near Luxillo ; sterile, Feb. 1857. 

 No 120 ; also No. 206, in part. 



Bumbo.— Mixed with Hepatics, attached to rocks in primitive 

 forests near Chao da Xella on the ascent of Serra da Xella ; without 

 fr. June 1860. No. 43. 



