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MOXOGRAril OF THE LABOULBENIACPLE. S03 
The types of this species Avcrc found on tlic upper suiface of the nbdoiiion of Us curious host, 
among specimens of the latter contained in the Museum collection at Cnmbrick'-c. Tlic dozen 
types obtained show a considerable variation in the mnnbcr and position of the appendages at 
the base of the stallv-cclls of the pcrithecium. The lader appear to arise always from the snmc 
cell, whether tlie individual produces one periihecimn or more than one. lu'a single instance 
three perithecia are developed, while a majority appear to have two. TJie few sp«'cimens acces- 
sible of the only American Deleaster were examined carefully, in the hopes of Hnding a similar 
parasite, but without success. 
CORETIIROMYCES Thaxter. Plate IX, Hgs. IS. 
Proc. Am. Acad. Arts ami Sci. Vul. XXVII, p. ^r,, aiul XWIII, p. igo. 
Receptacle consisting of several superposed cells, the sub-basal* cell and rarely alf?o tlic cell 
above it producing a stalked pcrithecium, the terminal cells giving rise to several branched 
appendages. Antheridial cells superposed to form an obliquely septate brnnchlet with projectJni: 
necks. Perithcciura symmetrical or nearly so, the stalk-cell well developed ; its cell-rows of four 
cells each. Spores once-septate. Trichogync filamentous, simj)le or branched. 
The material on which the original description of this genus is based was so insufficient that 
it has been necessary essentially to modify the present diagnosis in the light of more abundnnt 
data subsequently obtained. It approaches Rhadinomyces more closely than any otlier genus, 
especially in the character of its anthcridia, and may eventually have to be united with it. In 
all three species, however, a cell is present above the sub-basal cell of the receiitaclc, which is 
either sterile or produces a second pcrithecium, while in Rhadinomyces the secondary perithecia, 
which are very commonly developed, arise invariably from the sub-basal cell of the receptacle! 
There are other difleerences in general habit, character of the aj.pendagos, and details of struc- 
ture in the antheridial branchlets, which, though of less importance, all tend to make it seem 
advisable to keep these genera distinct until fui-thcr data concerning them can be obtained. 
In development the spore first divides into five superposed cells. The terminal one by sue- 
cessive proliferation from one side, produces a tuft of terminal branches and branchlets, which 
arc often broken or obsolete in older individuals. The sub-basal cell produces a single pcrithe- 
cium, which first api)cars as a triangular cell cut off from its anterior upj.er portion, as in 
Laboulbenia. The cell above this either remains unchanged or produces a second pcrithecium, 
while the sub-terminal cell gives rise to the main appendnges. The anthcridia arise as branch- 
lets from the main appendages, the terminal cells of which are sterile. The trichogync is well 
developed, slender, septate, and more or less branched. 
The three species are found on beetles belonging to the Staphylinidi^, and inhabiting very 
wet situations, especially along the margins of sti-cams or ponds. 
CoRETiiROMYCES Cryptobii Thaxtcr. Plate YII, figs. 1-2. 
Proc. Am. Acad. Artd and Sci. Vol. XXTII, p. 3G, and XXVIII, p. 181. 
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Pcrithecium usually very long and slender, becoming uniformly suffused with brown; 
straight, slightly inflated toward its base, tapering very gradually to its blunt symmetrical apex ; 
