THAXTER. — MONOGRAPH OF THE LABOl LBEM ACE.K. 127 
varying in length, consisting of perhaps eighteen to twenty cells, the basal cell and sometimes two or throe 
of those above it hyaline or nearly so, the rest indistinguishable, being concealed by the densely crow d ed 
appressed appendages, which are rather short and slender, deep brown or opaque rxtvpt along (he inn< r 
margin and at the tip; those around the base of the perithecium also densely crowded, snbe<ju;il blunt- 
tipped, wholly suffused, completely enveloping it and wholly concealing it till it is fully developed when 
the tip alone projects beyond them. Spores about 35-40 X 3-4 p. Perithecta 175 X 7.'» p or .smaller. 
Total length to tip of perithecium 400-550 p. The longer appendages about l_'(l n. 
On Colpodes agilis Chaud., British Museum (Biologia Coll.), No. 696, Jalap*, Mexico; on I atratus 
Chaud., British Museum (Biologia Coll.), No. 698, Irazu, Costa Rica; on Gymnulwpiis Mrximnm 
Putz., British Museum (Biologia Coll.), No. 682,. Cordova, Mexico. Usually on legs. 
This species, which in general appearance suggests a young shoot of larch or spruce, owing to its 
densely crowded appressed and undifferentiated appendages, is distinguished by it- broad tout perithe- 
cium, wdiich is usually almost completely concealed by the somewhat longer appendag which arise about 
its base, and by the enormous numbers of the latter which also render the main axis quite indistinguishable. 
The only species with which it might be confused is R. Jovamu in which, however, the 
much less numerous. The individuals on Gynandropus (fig. 3) have been taken as the type, although 
they do not appear to differ essentially from those on Colpodes. In fig. '.», Plate XL1V, tin- p<>ritli«-<-iai 
has become visible owing to pressure of the cover glass. 
ap|H> 
CLEMATOMYCES Thaxter. 
Proc. Am. Acad. Arts and Sci., Vol. XXXV, p. 439. 
1 !M K ) 
l*> 
a terminal perithecium and formed from a double row of cells; the cells of the external row producing 
sterile appendages, those of the inner producing secondary axes similar in Structure to the primary one, 
or antheridial branches; the secondary axes producing antheridial or ster.le branches on both sides, and 
like the primary ones bearing a single terminal perithecium. The antheridia simple, borne s.ngly, or 
usually in whorls, from the distal end of the successive cells of the antheridial branchlet, which CO ,ts 
of several superposed cells. .**...■ • 11 
The structure of the receptacle in this genus, although it suggc* that of D^kmgee,, is unite 
that of any other type, consisting as it does of Wo axes or cell-rows; an anterior (inner) luring mostly 
fertile branches, and a posterior bearing sterile appendages. The antheridial .»*« lnges whjcho, « 
both in the main anterior axis, and on its secondary branches, when the latter an. well .level.,,,, n 
6g. 2, recall the appendages of Arlhrorhynehus but they vary considerably both a, regards the number rf 
cells which compose them and of antheridia which they bear. The wall-cells „ the penthee. arc, 
numerous than usual, there being apparently seven in each row, although the lower W-ent » " ^ 
may prove to be upgrowths of the basal cells which function as wall-cells. The all,,,,,,., , I p nu re 
doubtful and although the appendages are so similar to those of A,;h,;,rl,ynr)n,, the ,,,„• may pro. ,„ be 
more nearly related to M oschomyces and Com psomyres. 
Clematomyces Pinophiu Thaxter. Plate XLIII ■ 6*. 1-4 
Free. Am. Acad. Arts and Sci., Vol. XXXV, p. 440. Apr, , 1900. 
Nearly hvaline or yellowish, the basal and subbasal cells small, the ****-£%£ 
twelve pairs more or less alternate ou either side, each cell of the outer series ^^*™£ 
celled u P su al ,y simple generally oppressed sterile appendage, £— ^£££1 Z 
brown, its basal cell almost wholly united to the cell of the axis next aboxe, lie 
three in number, usually with a single basal cell, the externa. ^^^Z^t^" -- 
inner fertile; the antheridial appendages of both primary and ^^7,, ri(lia ,,,,,,, „, u v 
times sparingly branched, those near the perithecia bearmg the greatest number of anth, 
