THAXTER. — MONOGRAPH OF THE LABOULBENI \CEJE. 247 
in the form of the appendages and perithecia, the former being longer and more slni<ln\ \\ ith more num- 
erous septa, and the latter laeking the subtenninal elevation, a condition which may, however, Ik' du 
to immaturity. 
RICKIA Cavara. 
}M>rt 
posterior 
one or two small cells bearing secondary sterile appendages or anthcridia, ami which is terminated by .1 
single primary appendage borne on a two-celled base: an (interior series similar to the posterior, but 
terminating in a perithecium, and a median scries ending opposite the base of the primary app udagr 
and extending downward to the basal cells of the other two series. Anthcridia irregularly disposed, tl 
numbers varying in different individuals, wholly free, subtended by a blackened septum, flask-shaped, 
compound. Appendages as in Peyritschiclla. Perithecium normally solitary. 
This genus, which bears a superficial resemblance to PeyritschirUa, is dearly distinguished by it 
free compound anthcridia which, in general form and appearance, so closely re mble simple anilieiidia 
that they were so described by Cavara. Stained preparations, however, show clearly that the antheridium 
consists'of a basal cell, immediately above the blackened septum, and that from this b. d cell a small 
number of antheridial cells arise, discharging together through the common ». The antheridial cell 
erv small, and I have been unable to make out their disposition more exactly than is shown in Plate 
are v 
structure 
examined, which was obtained partly through the courtesy of Prof. Cavara and partly from the s,»cen„en 
distributed by Rehm, does not correspond to the figures which accompany the original description m 
Malpighia. The basal cell constitutes a stalk-cell, which may rarely be once-septate, as m fig. 8; bul I 
usually single. Above this, in the youngest individuals (fig. 1), a subbasal cell is distinguished; above 
this two small superposed cells (fig. 4w), one of which may be except.onally absent, form the base - - 
cru 
This ;«|>- 
pendage, with its two basal cells, develops no further, and is carried upward, Without change of Form or 
structure, by the further growth of the receptacle, which results wholly bom the actmta ol the snb- 
' « ° ., 1 1 1 11 • I!. '1.1 U,r «« a J.mia .ct.llllt) /Will- 
be 
com 
pper 
(z) cell by a transverse septum. The lower of these two cells (fig. 3 s), then beg. . to-grow outward d,s- 
appendage, which may or may not be -so. 
theridium as in fig. 11, at right. In the next stage (fig. 4), the upper (o) of the two edb winch have 
resulted from the division of the posterior cell, divides into two cells by a long.tudmal septum and the 
remainder of the receptacle results from the activity of these two cell* together wrth that of the original 
anterior cell (y) at the right in fig. 4, which has, as yet, only elongated. Of these tnr~ 
tl 
while the middle cell prod 
wnue me miauie ecu nouu<_-c» mc «■ •««■». ~* * .... l 1 *u„+ 4;™ 1 ** 
be made sufficiently clear by an examination of the successive figures, ,f ,. ., remem!,* ,1 ha ■ . • 
4, 7 and 10 arc- dtivn with the anterior side at the right; whtle ,n the nmtauung hg, ,n ^ " 
left. The activity of the three cells just referred to, (*) and (y , wuh the cell lymg * ' J»* 
results from the iparation of . terminal cell from each, which, actmg „ a sclpn - « I . . . 
off cells below, which, in the anterior and posterior series, become .ecoodardy d, £*£%«£ I 
s,nall cells on which the anthcridia and secondary appendages are msert, ,1. A '<' ^ ' * "^ ' 
,Wicallv branches, and their growth a lornunal growth, the central UU 
posterior 
