156 
ENDOSPOBE^. 
[alwisia. 
of numerous irregulax', tubular threads, 0-5 to 1 mm. long, 3 to 
18 /X wide at their origin at the apex of the sporangium, whence 
they radiate downwards, tapering and branching at a wide angle 
below, the slender extremities attached to the wall about half- 
way down the sporangium ; pale red, beset with minute scattered 
papillfB. Spores pale red, closely reticulated over the greater 
part of the surface, the remaining part loosely reticulated, 5 to 6 
fji diam. — Mass., in Journ. E. Micr. Soc. (1889), p. 349. Trichia 
fracjilis Eost., Mon,, App., p. 39 (in part). Prototrichia Bombarda 
Mass., Mon., p. 128. 
Plate LVIII., B. — a. clusters of sporangia, x 2 ; 5. cluster of sporangia, 
X 20 ; c. immature sporangia, from a mounting in glycerine, showing, 
through the walls, the capillitium threads arising from the apex of the' 
sporangium, x 20 ; d. fragment of upper sporangium-wall, from which 
three capillitium threads proceed, only a small part of the thread shown, 
X 280 ; e. fi-agment of sporangium-wall to which the lower end of a branching 
capillitium thread is attached, x 280 ; /. spores, x 600 (Ceylon). 
This species is represented by a single gathering in July 1868 by 
Thwaites from Ceylon. The sporangia are to a large extent immature, 
purplish, and with the spores imperfectly developed, but a few are 
nearly mature and show the rufous-brown colour described above. 
Although the character of the long clustered stalks is peculiar, the 
colour and texture of the sporangium- wall, and the colour, size, and 
markings of the spores are similar to what is seen in other members 
of the TuhulinecR, while the threads of the capillitium find a close 
analogy in the tubular extensions of the sporangium-wall of Sipho- 
jitychium. 
Hah. On Jungermannia, growing on decayed wood. — GongoUa Forest, 
Ceylon (B. M. 1000). 
Order IV. — Reticulariace^. Sporangia combined into an 
jfithalium; sporangium -walls incomplete, perforated, or forming a 
spurious capillitium. 
KEY TO THE GENERA OF RETIGULARIACEyE. 
Sporangium-wall cap-shaped at the apex, continued down to the 
hypothallus in four to six straight threads. 
(30) DlCTYDI^THALIUM. 
Fig. dS.—BictydicstJiaUum jplwnbeum Eost. 
a. iEthalium. Natural size. 
b. Eight sporangia of an lethalium isolated ; in 
three the column of spores has fallen away, 
leaving the cap and persistent threads. Mag- 
nified 20 times. 
