UEVATICM COLLECTED IN CENTRAL AFUICA. 313 



So far as known, the greatest number of the species of this 

 group of J\recke7^a-\ike Mosses is found in the Indian Archi- 

 pelago, Pacific Islands, and Australia; and should some of 

 those as yet known only in a barren state |)rove to produce 

 an exserted capsule, they would approach very closely to Trachy- 

 loma. The Trachyhma dipitatum, Mitt, in Journ. Linn. Soc. vii, 

 p. 156, is more correctly a species of Hypnodendron^ very nearly 

 allied to S. arcuaium and the other species of the same group 

 as H. Archeri, It has the same tree-like mode of growth and the 

 same areolation, the ends of the cells having a callosity which 

 gives the leaves a dotted appearance, but which does not show as 

 prominences when the leaf is folded over. It is the only species 

 which has a nerve not continued to the point of its leaves. 



Erpodiitm, Brid. 



E. IIakxingtont, sp. n. (PI. ^Tl, figs. 4-7.) Monoicum; 

 caulis procumbens, radicellis fuscis repens ; ramis fertilibus as- 

 cendentibus pancis ramosus; folia caulina patentia laxe sursum 

 imbricata ovalia obtusa caviuscula e celluhs parvis rotundis virl- 

 dibus in dorso folii papilliformi protuberantibus obscnriusculis 

 limitibus pellucidioribus areolafa, apice in pilum SDquJlonguni 

 Ifevem albidum e cellulis angustis elongatis hyalinis compositum 

 subito producta ; folia in ramis fertilibus appresse imbricata in- 

 feriora ovata e cellulisi rotnndatis ovalibusque pellucidis limitibus 

 angustis, perichaotialia interna majora sensim in subulam hyali- 

 num angustata, cellulis folii heteromorphis papillis grossioribus 

 a.vperrima; theca immersa oblonga, operculo convexo apiculato 

 annulo lato, sporis Isevibns, calyptra brevis campanulata basi 

 multifida plicata apice subaspera; flos masculus gemmiformis 

 parvus. 



F- 



Hob, Ijakel!iy2iY\zn^ojiAdcmsonia diyitata{Bish(yp Hanninyton). 



Caulis procumbens uncialis cum foliis 1 mm. latus ; ramis fer- 



tilibns 2-3 mm. longis. Folia caulina 0*5 mm. lata cum pilo 



1'50 mm, longa. 



E, Schweivfurthii, C. Mull., Linn. 1875, p. 412, is described with 

 cordate leaves, " acumine a basi latiusculo breviter attenuate,' 

 and must therefore be quite different, although in some particulars 

 relating to the fruit it seems to agree pretty nearly; it is also 

 slated to be dioecious. Both species are allied most nearly to tlie 

 S.-Amcrican E. coronatum ; but still more closely agree \\ith a 



LlMf. JOUK>*. — BOTANX, VOL. XXII. 2c 



