HEPATIC^ COLLECTED IN CE^TUAL AFKICA. 325 



involuto, amphigastria caule parum latiora ; pcriautliium obcor- 

 datum, marginibus superioribus denticulatis. 



Hah, Niger Eiver, creeping on Plagiochila neckeroidea {Barter). 



w 



Lejeunea (§ Prioxolejeunea) deplanata, sp. n. (PI. XIX. 

 figs. 4-G.) Monoica ; folia lata ovata obtusa subacutave, margine 

 minute creinilata, cellnlis minutis areolata, lobulo obsoleto, amphi- 

 gastria caule vix duplo latiora j periantliio obcordato, mar- 

 ginibus superioribus crcnulatis. 



Hah, Island of Bourbon, on Buzzania decrescens^ ex Jierh. 

 ]\Iontagn€. 



L. (§ Leptocolea) ADHiEsiYA, sp. n. (PI. XIX. figs. 7-9.) 



Monoicaj ad folia viva repens planissima affixa pinnatim ramosa ; 

 folia rotundato-ovata imbricata, niargine cellulis tenuissirais an- 

 gustis a reliquis diversiformibus pallidis limbata, lobulo in laci- 

 niam lanccolato-ligulatam oralemve cauli subparallelam producto 

 in ramis fertilibus subquadrato saccato varieformi ; folia involu- 

 cralia majora obovata lobulis subovatis ; perianthium (juvenile ?) 

 immersum late obovatum planum ventre linea carinaeformi nota- 

 turn ; antheridia in saccis foliorum infra involucraliuminclusa. 



Hah. Usagara Mountains. 



Very pale brown, adhering to the leaves on which it grows as 

 if by the suctorial leaf-margins ; in this particular it agrees with 

 many other species of this group. The perianths are all alike 

 and of the same small size, and are probably immature. The 

 form of the lobule is unusual ; but the same elongation is seen in 

 the Indian L, producta. 



L. (§ Coluea) digitalis, sp. n. (PI. XIX. figs. 10, 11.) 



Eepens, pinnatim ramosa; folia patenti-divergentia subovato- 

 oblonga, margine ventrali involuto apice in cucullum oblongum 

 teretem obtusiusculum tertiam partem folii longitudinis occu- 

 pantem producta amphigastria profunde, bicrura. 



Hah. Usagara Mountains, on leaves. 



The fragmentary specimens show that this is a species in size 

 and habit approaching the L. superha of the Pacific Islands. 



L. (§ CEnATAXTHE) COEXUTA ?, Liudenh, 



Hah. Usagara Mountains. 



The specimens, mere fragments, clearly indicate the presence of 

 a species of this group and, like some others from the western 

 coast, are too incomplete to be certain of their identity. 



