THAXTER. — LABOULBENIACE.E. 101 



Camptomyces melanopus, nov. sp. 



Perithecium tinged with brownish, slightly inflated towards the 

 base, its distal half narrow, tapering gradually to the rounded apex 

 below which on one side is a rounded projection ; borne on a large 

 subtriangular stalk cell surmounted by three smaller basal cells. 

 Receptacle narrowly funnel-shaped, tapering to a pointed base and 

 consisting of a large basal cell, slightly translucent near its lower 

 extremity, but otherwise becoming wholly opaque, followed by a flat- 

 tened sub-basal cell from which the mature perithecium with its stalk 

 projects nearly at right angles to the long axis of the receptacle, while 

 distally it bears the appendage. Appendage bearing terminally the sub- 

 conical slightly asymmetrical antheridium. Spores about 25 X 3.5 p. 

 Perithecium 130-150 X 30-33 /x. Total length to tip of antheridium 

 110-125 ft. Greatest width 25 p. Antheridium 25 X 16 p. 



On Sunius prolixus Er. Waverly, Mass., and York, Maine. 



This curious form affords an additional example of a highly de- 

 veloped type of antheridium which has neither the peculiar honey- 

 comb-like appearance of Cantharomyces and Haplomyces nor the 

 more simple type of Peyritscbiella and its allies, Dichomyces and 

 Heimatomyces. It is distinguished from the two genera first named 

 by having a strictly terminal pore without appendages of any kind. 

 It shows a clearly defined cavity within which the spermatia are 

 formed which is surrounded on three sides (wholly near its base) by 

 several rows of cells not symmetrically disjtosed. The species occurs 

 rather rarely on the abdomen of its host, the perithecia being usually 

 directed forward. 



Peyritschiella geminata, nov. sp. 



Hyaline. Receptacle asymmetrical, consisting of a single basal 

 cell followed by three successive more or less definite transverse rows 

 of cells. The lowest of these rows is the most variable and irregular, 

 consisting of from two to four cells, one of which, larger than the rest, 

 is an axile cell continuing the basal cell directly, while the remaining 

 one to three cells are cut off from it on one side, each successive cell 

 smaller and placed higher in the series, the outermost and uppermost 

 bearing one of the sterile appendages characteristic of the genus. The 

 second row also consists of a larger axile cell, which is free for a short 

 distance on one side, and on both sides of which are cut off, as in the 

 first row, from two to four cells, the smaller uppermost ones on both 

 sides giving rise to from one to three appendages according to the 



