Plagiochasma. franz stephani. species hepaticarum. 779 



lunatse, sensim in appendiculum angustata, appendiculis hyalinis soli- 

 tariis, e lata basi acuminatis brevîusculis, acutis, haud constrictis. 



Carpocephala breviler pedunculata, pedunculo-fusco-brunneo, atte- 

 nuato, apice breviler barbato; capitula vertice breviter umbonata, rugu- 

 losa. Sporœ 76 jjl. Elateres brèves 200 ^ bispiri, spiris anguste tortis. 

 Andrœcia furcata, in ramulis posticis obcordatis. 



Hab. Africa orient. Kilimandscharo, ad lacum Dschalla (Holst). 



4. P. tenue St. n. sp. 



Dioica, major, viridis vel pallide virens. Frons usque ad 2 cm. longa, 

 3-4 mm. lata, ex apice innova ta, antice subplana, postice purpurea, costa 

 angusta, vix producta, alis tenerrimis, crispatulis. Stomata minima, poro 

 parvo, 4 solum cellulis conicis circumdato, saepe ad rimam angustam 

 reducta. Cellulee epidermidis trigonis magnis incrassatse. Squamœ posticse 

 magnse, marginem frondis superantes, e lata basi subtrigonse, apice ad 

 2 /s bifidse, lobis geminatim approximatis, arcte parallelis anguste trian- 

 gulatis sensim acuminatis, acutis, nullibi constrictis. Peduncuhis brevis 

 (7 mm. longus), apice longe barbatus. Receptacula valde convexa, biloba, 

 lobi antice convexi; sporœ retkulalim anguste alatee 60 {x, flavescentes. 

 Elateres concolores, 220 ^ trispiri, spiris laxe tortis. Andrœcia ignota. 



Hab. Africa australis. Transvaal (Mac Lea, Wilms.), Usambara (Holst), 

 Angola (Welwitsch). 



Squamis triangulatis profunde bilîdis facile distinguenda. 



5. P. limhatum (Taylor) Nées. Syn. Hep. p. 516. 

 Syn. Fegatella limbata Taylor, J. of Bot. 1845, p. 95. 



Dioica, minor, viridis, subtus purpurea. Frons usque ad 18 mm. longa, 

 5 mm. lata, dichotome ramosa, crassa, costa lata, convexa. Stomata parva, 

 poro minuto, cellulis 5 obconicis circumdato, parietibus radialibus maxime 

 œqualiterque incrassatis. Cellulse epidermidis trigonis magnis incrassatee. 

 Squamœ posticae parvee, oblique lunatse, longe (ssepe geminatim) appen- 

 diculatse, appendiculis haud constrictis, e lata basi longe acuminatis, 

 acutis, margine papulosis. Carpocephala plus minus longe pedunculata 

 (ipse haud vidi) pedunculo longe barbato; capituli discus centralis 

 rugosus, involucra plerumque 2. Sporœ ? Elateres brèves. Andrœcia 

 rotunda ssepe seriata. 



Hab. Insula Ascension. (Hooker). 



76 



