244 THAXTER. — MONOGRAPH OF THE LABOULBENIACE^E. 
immediately below the integument, the two branches diverging so that the individual cannot be detached 
without breaking one or both of them. The male, however, develops merely the simple rhizoid, shown 
in fig. 8, a slight swelling immediately below the integument serving to hold it with sufficient firmness. 
Dimkkomyces coarctatus Thaxter. Plate XXVIII, Figs. 1-5 and 17. 
Proc. Am. Acad. Arts and Sci. ,Vol. XXXVI , p. 410. March, 1901. 
■ 
Male Individual. Receptacle nearly hyaline, consisting of usually three superposed cells, the upper 
separated by a dark-colored constriction from a short, simple, two- to three-celled hyaline or brownish 
appendage. The antheridia usually two, seldom three, borne singly from the successive cells of the 
receptacle, from which they are separated by a small basal cell; the venter having an external depression 
and not abruptly distinguished from the stout curved neck. Receptacle 35-45 X 6-7 fi. Appendage 
25-50 /i. Antheridia 18 X 5 /£. 
Female Individual. Receptacle consisting of a large basal cell about twice as long as broad, bulging 
so as to form a rounded base which pushes the small brownish-black foot to a lateral or sublateral posi- 
tion; the remaining cells, usually eight or nine in number, separated by horizontal septa and superposed 
in a simple series; the lower cells greatly flattened, those above somewhat less so, the series ending in a 
somewhat abruptly narrower terminal cell, which is more than twice as long as broad, subcylindrical, 
its extremity rounded symmetrically and bearing a short, simple, usually four-celled terminal brownish 
appendage, which is distinguished by a constricted dark basal septum, and terminated by a somewhat 
inflated lighter larger cell, which becomes characteristically disorganized on one side, so that the append- 
The remaining cells of the receptacle producing single 
cell. The uppermost of these 
age appear 
appendage 
secondary appendages arises from the inner side of the subcorneal subterminal cell of the receptacle, 
occupying a position in the median line between the primary appendage and the base of the first perithe- 
cium, and consists of a short subcorneal basal cell, from the narrow extremity of which the simple, several- 
celled terminal portion is distinguished by a constricted dark septum; the remaining appendages laterally 
divergent on opposite sides in such a way as to appear paired, usually three on each side, each consisting 
of a rather long basal cell inflated along its upper side so as to appear more or less geniculate, concol- 
orous with the receptacle, its narrower extremity suffused with dark brown, distinguished without con- 
striction by a dark septum from the simple terminal portion, which is usually five-celled, more or less 
strongly recurved, brown, its terminal cell becoming inflated and undergoing gelatinous degeneration 
on the lower side, which causes it to appear split in two, the hook-like upper half of the cell alone per- 
sisting in some individuals. Perithecia yellowish, distally brownish, one, rarely two, in number; the 
first always arising from the cell immediately below that which bears the upper secondary appendage, 
the second, when one is present, replacing one of the appendages lower down; consisting of a symmetri- 
cany inflated venter, which tape 
abruptly distinguished 
a short neck rather 
. , *"' " "■ lulumcu papmse 01 unequal size, and one or two of whicn are poimeu 
an. much more prominent. Spores 42 X 3.5 p. Perithelium, including the stalk, which is continuous 
"J ' I ' ^ 2 °7 3 , 5 lL Rece P tad( - to base of primary appendage 50-75 a. Secondary appendages 
about 75 ai. Total length to tip of perithecium 150-180 )i. 
Densely crowded on the inferior surface of the abdomen or rarely on the legs of a small pale fly. 
Ralum, New Pomerama. Berlin Museum, No. 1282. 
AjJ^H^!H mat0rial ,° f thJS SpedeS has been ****&** and although it grows on the soft inferior 
hauZh J. if 1 " 1 "' °u " SimHur h ° St and in the same P«««. ^ shows no tendency to develop the 
ess h^ fo™ Tv° CharaCt0ristic of *■ lading species. The two are very closely allied, neverthe- 
2rTJZ " nd , d, f S1 ?? Ul0n 0f the appendages, which project something like the legs of a crustacean, 
■flMng the most striking p 01n t s of difference. The individuals usually occur crowded in large num- 
