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III. On some new species of Musci and Hepaticse in the Herbarium of Sir W. J. Hooker, 

 collected in tropical Africa, chiefly hy the late Dr. Vogel and Mr. Barter. By 

 William Mitten, A.L.S. 



Eead March loth and June 21st, 1860. 



Leptotrichum, Hampe. 



L. NITIDULUM. Dioicuin, gracillimum, humile ; foliis erecto-patentibus e basi latiore 

 sensim angustatis lanceolatis obtusiusculis integerrimis, nervo ubique a pagina 

 distincto percurrente, cellulis basi infima majoribus oblongis inde angustis mollibus ; 

 pericbsetialibus obtusioribus ; tbeca in pedunculo trilineari gracillimo luteo erecta, 

 late ovali, ore parvo, opereulo subrecte subulate, peristomio dentibus parvis rubris 

 rugulosis solidis, annvilo lato composito trigono ; j)lanta mascula ramis brevibus 

 floribus gemmiformibiis termiiiatis. — L. exigno simile. 



Hab. On the earth. River Niger [Barter). 



More slender than L. exiguum.= Wiessia exigua, Sch.\v. = Dicranum xanthodon, Hook., inhabiting the 



West Indies and South America, and with more shining pale-green leaves. 



Tab. V. fig. 1. 1. Plant (of the natural size) ; 2. a leaf, 3. the capsule, 4. the same after the fall of 

 the operculum, 5. a portion of the peristome, and 6. a fragment of the annulus seen transversely 

 (all magnified). 



Stereodon, Bridel ; Mitten, Muse. Ind. Orient, in Linn. Journ. Bot. Suppl. vol. i. p. 92. 



S. Barteri, Mitten. Monoicus ; foliis imbricatis late ovatis bre^d-apiculatis coneayis, 

 maro-ine (sieco) recurA^o integerrimo, nervis binis brevissimis, cellulis alaribus pluri- 

 bus quadratis viridibus, superioribus elongatis angustis ; pericbsetio magno ; foliis e 

 basi ovata convoluta lanceolatis, internis erectis, parapliysibus exsertis; tbeca in 



pedunculo brevi luteo pericbsetium paululo superante ovali, peristomio dentibus ? 



— Habitu S. lovgiseti, sed gracilior. 



Hab. On trees in deep ravines. Nupe ; River Niger [Barter, 1422). 



Pale yellowish green, shining. Remarkable on account of its very short seta ; in other respects closely 



agreeing in structure with S.longketus = Neckera lonyiseta, Hook. 



Tab. V. fig. 2. 1. Plant (of the natural size); 2. a leaf; 3. perichfetium, male flower, and capsule 

 (magnified). 



Stereophyllum, Mitten, Muse. Ind. Orient. I. c. p. 117. 



S. nitens, Mitten. Monoicum ; foliis elliptico-lingulatis basi contractis apice subacutis, 

 nervo temti medio evanido, marginibus superne subserratis, cellulis basi ad angulos 

 quadratis inde ad apicem elongatis angustis parietibus crassis ; perichajtialibus parvis 

 ovatis acnminatis parce serrulatis ; theca in pedunculo gracili rubro parva ovali incli- 

 nata horizontalive, opereulo brevi-rostrato, peristomio interne processibus longitudine 



h2 



