292 TIIAXTER. — MONOGRAPH OF THE LABOULBENIACE^K. 
Hebpomtgbs NvcTOHORiE Thaxter. Plate XXXIX, figs. 5-8. 
PttKJ. Am. Acad. Arts and Sci., Vol. XLI, p. 309. July, 1905. 
Mak individual Axis consisting of five or six cells, the basal somewhat elongate, the rest short 
and somewhat rounded, the terminal one abruptly apieulate; the distal cells producing branches which 
in (urn brand] three to four times, the ultimate branchlets bearing the anthcridia terminally in groups, 
the whole forming a dense tuft. Axis about 54 X 10 p, the total length to the tips of the anthcridia about 
tOO /C Antheridia 20 X3/i. 
Female individual. Colorless, the primary receptacle consisting of four or five cells, the terminal 
one short and apieulate; the subbasal (perhaps others also?) giving rise to branches which produce a 
variable number of secondary receptacles arranged with the younger behind the older, as in //. Paranenms. 
The secondary receptacles much as in 77. Paranenms, the first formed broadest. Perithecium long and 
l« nder, tapering, especially above the middle; the stalk-cells flattened, so that the perithecium is almost 
ile on the receptacle; the aseigerous portion often abruptly somewhat narrower than the base, the 
fourth lateral external wall-cell bearing a long curved attenuated wholly free spine-like cell, which extends 
just beyond a subterminal short distally incurved sharp spinous process, which subtends, and is nearly 
twice as long as, the free curved tip of the perithecium: the fourth anterior wall-cell also producing a long 
>re divergent. Secondary receptacles 
cur\ 
i 50 fL Base and stalk-cells of perithecium 30-35 X 15-18 
0-165 a: width near base 20-25 ic below lower spine 10-12 
12* 
On 
II 
male individuals, and in the form and structure of its perithecium. The slender tapering habit, and the 
arrangement of the spines in relation to the tip, being quite different; although the form and arrangement 
of the secondary receptacles are very similar. 
IIekpo.myces Paranensis Thaxter. Plate XL, figs. 1-6. 
Proc. Am. Acad. Arts and Sci., Vol. XXXVIII, p. 19. June, 1902. 
Mak individual. Terminal cell distally modified to form a long slender flexuous tapering unicellular 
prolongation extending above the tips of the antheridia which are few in number, terminal on rather long 
often several-celled branchlets. Total length to tip of terminal prolongation 250 \i\ the prolongation 
185 fi. Anthcridia about 60-70 pi 
Female individual. Primary receptacle very small, the distal cells rounded, the uppermost pro- 
longed as in the male. First secondary receptacles developed on either side of the primary, those formed 
later lying behind them on either side so that the perithelia are more or less clustered (younger ones 
appearing behind the two primary ones), and each secondary receptacle developing a shield-like structure 
sternal to the base of the first fertile cell, like a buttress, the outer and upper margins of which are free, 
consisting of sterile cells which are greatly elongated vertically and very narrow, similar and successively 
primary 
maining 
pentheca, of which there may be from four to six or more. Perithecia very similar to those of II. 3- 
cusjndatus, but with the following differences: the greatly elongated fertile cell of the receptacle extends 
marly to the base of the perithecium, the posterior stalk-cell extending downward beside it nearly to its 
base, covered by the protective shield exec pt at its distal end, which is connected by a narrow isthmus 
with an abrupt short broad terminal enlargement; the anterior stalk-eell small, short, subtriangular in 
outline; the base of the perithecium abruptly somewhat broader, its cells protruding more or less dis- 
-ncty; the aseigerous reg.on thus somewhat clearly distinguished, especially posteriori v, 'relatively dis- 
tinctly larger than ,n II. tnrmpidatns somewhat inflated; the conformation of the distal portion 
