j BRITISH JUNGERMANNIiE. 
f be setaceous, patent, incurved, furnished, as in J. trichophylla, with transverse dis- 
sepiments, which form joints rather longer than broad, a little swollen in the middle, 
and often also divided by longitudinal septa, in a manner similar to that of the 
plants forming the division of the Conferva, which Mr. Dillwyn has called - longi- 
tudinalithr venosae ” : these dissepiments arc visible also in the younger branches, 
but the old ones want them, and have the common cellular appearance of the 
genus. The color of the leaves, and, indeed, of the whole plant, is generally a pale 
yellowish green, darker, and even of an olive brown, when it grows in very shaded 
situations. In drying, the same disposition of the coloring matter appears as in 
J. trichophylla, and the leaves become much more incurved. 
Perigonial leaves so thickly clustered upon short branches as to form a little spherical 
ball, very evident even to the naked eye. The exterior are for the most part simple j 
the interior, from a broad and expanded base, become, at the extremity, divided into 
a number of narrow laciniae of uncertain lengths 5 all of them incurved and lying 
closely imbricated over each other. 
Pericheetial leaves (f. f. 8 . 8 ) equalling half the length of the calyx, to which they are 
closely appressed ' all of them oblongo-ovate, and divided nearly to theii base into 
several narrow, whitish, and sometimes branching, laciniae. 
The Male Fructification, which I have received from Mr. Lyell since the engraving of the 
plate was completed, differs from that of J. trichophylla in being situated upon extremely 
short lateral ramuli. The Anthers arise from the axillae of the perigonial leaves. They are 
extremely small, ovate, approaching to round, when perfect of an olive-green color. The 
footstalk is about the length of the anther, white, pellucid, having numerous transverse 
septa, which are very evident under a high power of the microscope. 
Female Fructification lateral, sessile, or supported upon a very short footstalk. 
Calyx (f. 9) very small, scarcely exceeding a quarter of a line in length, narrow at its 
base, then cylindrical, very pellucid, almost white, of an extremely thin and delicate 
texture, marked all over with oblong reticulations, which are large in proportion to 
the size of the calyx; the mouth is not at all contracted, but of the same width as 
the rest, cut into numerous long erect cilia. 
Calyptra (f. 10 ) ovate, white, thin and delicate, marked with roundish reticulations; 
at the . base surrounded by five or six almost linear, greyish, abortive pistilla. 
Peduncle' rather more- than a quarter of an inch long, pellucid, delicate, vasculose. 
Capsule ovate, deep brown, opening .into four equal, ovato-lanceolate, transversely and 
longitudinally furrowed valves. f 
Seeds and spiral filaments (f. 12) : h of them in every respect resembling those of 
J. trichophylla: many of the la.^'i iontinue to adhere in a similar manner to the 
2 * wjr margins of the valves of the capsule (f. 11 ), a circumstance not uncommonly 
observable in many species of this genus. 
