HEPATIC^ COLLECTED IN CENTExVL A.FETCA. 299 



rible, 6 inclies in four days ; so that I am expecting an unhealthy 

 time shortly. This new road is perfectly healthy ; I think the 

 dangers have been greatly exaggerated. The road being healthy, 

 one can endure much vexation and delay ; travelling has been as 

 though I was in England or Wales." 



On another slip of paper he goes on : — '* I found three or four 

 brambles on Kilimanjaro, also Sibthorpia and ArtJirolohium. I 

 found also another Hydnora ; and have determined in my own 

 mind beyond any question that there are two species — growth, 

 habit, size, substance, colour, shape entirely different ; what more 

 can you want to make a species ? " This refers to doubts expressed 

 when he brought home from his first journey a painting of a species 

 he had met with. 



In the interval between the Bishop's two expeditions a box 

 was sent from the Usagara by Mr. Last, containing sundry objects 

 of natural history, a variety of living plants and ferns packed in 

 lichens, chiefly Parmelia perforata^ amongst which were a few 

 additional Mosses. The living plants were Dorstenia indica ; a 

 tetraquetrous Euphorhia ? with mottled green and white stems 

 and oblanceolate foliage ; also Asplenium trifidum. With these 

 were dead Orchids and Perns j some of the latter being planted, 

 gave rise to Streptocarpus caulescens and S. KirMi^ as well as 

 Impatient Sultani ; these were supposed to have come from an 

 altitude of about 4000 feet. 



All the species in the following enumeration, unless otherwise 



stated, were collected by the Bishop himself. 



Archldium, Brid. 

 AFEiCA^TjM, sp. u. (PI. XV. figs. 1-^.) Mouoicum 



caulina 



oblongis, perichsBtialia subduplo longiora latioraque, apice sub- 

 ulate acuminata, thecam globosam obtegentia ; sporis obtuse an- 

 gulatis rotundatis (17) ; flore masculo gemmiformi. 



Sah. TJsagara Mountains. 



Similar to the European A. alternifolium, and differing in 

 habit and also in the oblong not abbreviated cells of its leaves 



African A. EcMonii 



length 



of the leaves in A. Ecklonii occupies two thirds. 

 It appears probable that the species of this genus will become 



2b2 



