THAXTER. — MONOGRAPH OF Till. \IH>rLHENIA< . 249 
(din lit ion is «-orrt 
below the antheridia, .Plate LXXI, fig. 5. If this interpretation of the 
cell, from which, as in other compound antheridiu, the antheridial cells arise a.s endogenous hranehlets 
proliferating into the terminal cell, by its enlargement and elongation pushes tin group of antheridia 
through the terminal cell, which is destroyed during the pro<< The development of the receptacle 
is almost exactly that of Rickia, exeept that the cell (o) of fig. . Plate XXXIV, is not divided 
longitudinally, but as a result of transverse divisions, develops, like cell (x) <>f fi<r. |. to form the 
|>osterior series of the receptacle, the median seri. s of Rickia not developing ;it all. 
The genus has an especial interest as suggesting that the simple aiitheridiuni may p" ibly have 
arisen from the compound, rather than that the reverse has taken place, and < indicating the method 
by which this may have been affected. Yet it should not be regarded as in the lea-t proving that the 
evolution of the antheridium in the family has not in general been from the simple to the compound 
type. 
STICHOMY 
Hi 
Proc. Am. Acad. Arts and Sci., Vol. XLI, p. 308. July, 1905. 
Slender and considerably elongated, or sometimes short and Mont: the prima, axis consisting of 
from twelve to thirty cells, more or less, above the subkisal cell of the receptacle, wmcwhafl proliferous 
distally beyond the base of the primary appendage, the small cells thus formed, one or two of then, ap- 
pendiculate, extending to the free tip of the perithelium; the perithecial axis consisting of from six to 
twenty-six cells, more or less; the peritheciuin slightly broader, but not distinguished from the axis, 
wholly united on its inner side to the primary axis, more or less s.rongly curved outward to its blunt tub- 
truncate free tip. Appendages as in PcyritschirUa, hyaline, rather slender, very rutably d< v, I.., 
borne on a small triangular cell, separated distally and externally from the cells of the axi mim-tin 
numerous, often few and scattered, or almost wanting except distally. where all the evils of the pr.n,,r 
axis are usually appendieulate. Antheridial branch. I borne like the sterile branch i, irregular m por- 
tion and number, sometimes even absent, usually confined to the lower half of the axis, mow often near 
the base, consisting of a short stalk-cell bearing terminally a compact erect group ol lask-sha^d an- 
theridia, usually four or five in number, their short broad_ necks at fart ctosdy approximated w 
coherent, divergent only after full maturity. Peritheeium 50-55 X" ' " ~ 
75 X 
1 5-20 /i. I-'»nge 
iger 
and stouter 125 X 36 (L Secondary perithecia may develop from cells of either axis if the primary 
peritheeium does not develop or is destroyed. 
On the head, antemue and under surface of Lcphchirv* sp., Java: Pouyer, , 1 KW. 
This species shows very considerable variation in its general habit and m the distribution of .to 
appendages and antheridia, as is indicated by the accompanying figufl , As usually h„ m ns .ndmd- 
uals which occur on the legs, or in other exposed positions, are commonly short and stOU whfle those 
on the thorax or abdomen are characteristically elongate. On account of ,ts small **. ami pale color 
it is detected with great difficulty. 
DICHOMYCES Thaxter. 
This genus, of which only three representatives were included in my Monograph, ha. proved one 
& ' . J .. . . .. - ... — :— ^ amM^rl lijihit. a louffh the general 
specie 
type 
peeies 
one can usua 
developed individual, only on the body of elytra 01 the nasi 
. — — 1 r^.lfnrmpd and continually reverting to the Pey- 
tnose developed on me appendages ut-mg, *» &**?—> t .... . , . _» ,i,. w i rinp< i 
,-,7W,,W/ a -eonditi„n; losing the bilateral symmetry 'of the ««£*, « h,eh . »-" » ' ( " 
individuals of all species, a„,l poss, rfag but . single antberabum. Su eh a fo m >f , ; ' - ^ J 
formerly described as a new spec of ¥ V , . <•*.<■ Ih. 1 . mj * < ■ ' p ,,,,;,,,,„,„„, „,;, „.. 
this nature. Sinee Dichomyces must be cons.dcred merely as an , laOoration 01 ./ 
