222 MOXOGRAPn OF THE LABOULBENIACEiF. 
h 
consisting of two basal cells, the outer becoming blackened, bearing terminally a variable num- 
ber of branches arranged in a single antero-posterior fan-like scries ; the branches mostly furcate 
near the base, the inner producing short, somewhat specialized antheridial branchlets, bearing 
terminally two to five antheridia. Receptacle variable, often short and stout, sometimes elongate, 
normal in form. Spores, 75-85 X S /x. Perithecia (average), 165 x 75 /x. Appendages, longest, 
about 375 fi. Total length to tip of perithecium, 150-650 fi. Average, 525 /z. 
On JJracJiinus, several species, Maine to Texas. On B. mexlcanus Pcj., Oaxaca, Mexico. 
This well marked form, although subject to very considerable Tariations in size, sljapc and 
in the character of its appendages, can hardly be confused with any other species. la excep- 
tional cases the appendages are comparatively simple, as in fig. 2, in which the inner basal cell 
bears two ordinary branches in the usual way, but in the great majority of cases this cell 
becomes proliferous from its inner upper angle, each successive proliferation resulting in a 
brand), the resultant groups of branches forming, with the outer appendage, a crest-like series 
(figs. 1 and 3) of very characteristic appearance. Tlie appendages arc very apt to be broken, 
especially the oittmost branches, which are often deeply blackened (fig. 3). "When growing on 
the legs and jaws the specimens are usually very small and stout (fig. 1) ; but on other portions of 
the liost very elongate forms often occur. The species is by no means uncommon, and has been 
found in numerous localities about Cambridge and Kittery (Maine). In two specimens from the 
last locality, fine trichogynes were obtained which arc copiously branched, many of tho terminal 
branchlets having a spiral habit and ending in a distinct knob-like enlargement. The nntlic- 
ridial branchlets, although not as highly developed, recall those of L. variabilis which, however, 
does not seem otherwise nearly related. The hosts are more often found under stones about 
ponds and streams, and are recognized by their habit of discharging a cloud of i.ungcnt vapor 
when disturbed. 
Laboulbexu zanzibaelxa Thaxter. Plate XVII, fi<rg. 1_3. 
XXVllI 
Ohvc brown, the basal cell nearly byalino. Perithecium rather large, more deeply colored 
belo^r the somewhat suffused tips of the lip-cells, the latter not prominently distinguished, 
lormmg a slightly enlarged, broad, somewhat flat-lipped, almost straight apex. Appendages 
consistiug of two basal cells, the outer producing externally a single obliquely vortical series of 
branches their basal cells inwardly concave and bearing externally a secondary series of 
brunchle s arising hko tlie primary ones and producing branchlets of the third order : the inner 
basal cell producing similar shorter series of branches on either side; tho branches, like those 
of he outer appen age some of them producing antheridial branchlets bearing a terminal nnv 
slliH tl / , T'" '""'' ''™"'='''^'' °^ ''°"' "1>P-'^''S0S similar, cylindrical, bent 
i '^nu: 'f "", P;"">^;™-- «-^P'-e •becoming nearly op^.uo, its dark portion; dis- 
e ia ion; r r'""' "'" ^' '=™""""'^ ''°»"-'-^- ^— '"'0"t 50 /ion.. Peri- 
200 1 Appendages (longest), 200 ^. Total length to tip of perithecium, 185- 
On Orepidogaster UmaciiUta Boh, Zanzibar, Africa. 
