THAXTER. — MONOGRAPH OF UNO LABOULHKN 1 M I ;.i:. 201 
PBYRITSCHIELL a A.mazonica Thaxtrr. Pbte XXX. fig. 10. 
Proc. Am. Acad. Arts and BcL, Vol. X\ \ V, p. 427 April, 1900, 
Perithecilim translucent brown, about as long u the receptacle, sub-elavate, lai : . contracted below 
to form a neck-like base, somewhat inflated distally, the tip well, though Hot abruptly distingubhecl, 
tapering to the nearly truncate apex formed by the slightly expanded tips of the IijmvIIs which are other- 
wise unmodified. Receptacle rather narrow, pale translucent brown, consisting of a single ba al cell 
followed by three tiers of cells; the lower symmetrical or nearly so, consisting of three long nan \ nearly 
equal cells not appendicular and not projecting laterally: the 4 middle 1 tier nol asyinmetrieal, consisting 
of about twelve cells, the series projecting distally on either side, all the cell \<vpt the three larger me- 
dian and the external ones, producing distally short typical appendages, the third eell on the right from 
the median cell bearing a prominent erect antheridiuin: the terminal tier \< ry similar to the middh 
one, consisting of about the same 1 number of cells which produce short typical appendagt s distally and 
(in the types) a single nearly median perithecium. IVrithecia JOO-210 X 36 ji. Receptacle 225 X 
70 /i. Antheridium 45 f± long. Total length to tip of perithecium about 400 //. 
On an undetermined staphylinid. British Museum, No. 400, Nauta, Amazon River. 
This and the following species, P. Xanthopygi, should in all probability !>c united, ahhough now 
of the numerous specimens of the latter possess the stalked and subclavate perithecia characteristic of 
the present species, and there are slight differences in the Form and structure of the reccptacfc Although 
I do not regard them as distinct, both names are here provisionally (stained until more and better mad 
rial of the present form can be examined. 
PeYRITSCHIELLA Xanthopygi Thaxter. Plate XXX. fig. II. 
Am 
June, 1901. 
Basal cell of the receptacle very small, or hardly distinguished from the foot: the first tier consisting 
of three subequal cells without appendages, the middle one somewhat shorter than tho on either ride 
of it: the second tier asymmetrical, consisting of three subequal median OeDs, the margins of the two 
outer free below for nearly half their length and coincident with the margins of the tier belo\ the appen- 
diculate "marginal" cells, about three to five on either side, separated from them usual by obliqu. 
septa; the first on the right bearing the large, slender, pointed, nearly straight purplish antheridium^ 
the upper tier consisting of about fifteen or more cells, the series distally con 
on either side above the base of the perithecium and bearing the usual apj>endages. Perithecium sol,. 
tary at the right of the median (primary) appendage, almost symmetrically inflated from base to apev 
dull purplish; the tip slightly darker, hardly (list 
ing; the lip-cells hardly projecting. Pcrithecia 
length to tip of perithecium 310-360 /i. 
On the abdomen of Xavthopygus SoUkyi Sharp. Sharp Collection, \o. 1MB. 
A form which is probably not distinct from P. AmaMOmca, although differing in po- s.Og a stalk, « 
and symmetrical perithecium. 
oguished; the apex truncate, men 
Li 1 ~>0 X 34-42 «. Receptacle 200 
1 
LIMNAIOMYCES Tl.i.xtrr. 
. Arts and Sci., Vol. XXXV, p. 428. April. 1900 
below the peri 
to its posterior margin; the basal portion consisting of a single basal cell, surmounted by ro ben of 
cells, the anterior cell of tin- upper tier giving rise to a compound anthcridium m structure «mflar to 
that of Pe,,ri1*rhivUa: the distal (marginal) portion consisting of an inner and an outer elongated ell, 
the inner ierminating in one of the bdl-shaped appendiculate cells characteristic «* ' httorumyce* pa- 
rated from the simple appendage by a broad, constricted, blackened leptum; th, outer, by wcecss.ve 
subterminal external proliferations, forming a series of evils from which a ..nailer .ndary a PI ,nd.e„late 
cell is separated above. The proliferation taking place to the right and left WCce-weiy, so that th 
appendages appear 
