THAXTER. — ARGENTINE LABOULBENIALES. 107 



Amorphomyces Ophioglossae nov. sp. 



Male indlcidual, reliitively lon«^ and slender, nearly straight, the 

 basal and siihhasal cells nearly equal, the antheridial cell as long as 

 both combined. The subbasal cell deep reddish brown, contrasting 

 with the hyaline basal cell and the straw-yellow slightly asymmetrical 

 antheridium, the neck of which is about as long as the symmetrically 

 inflated venter. Total length, including foot, 55-65X5 m, the antheri- 

 dial cell 28-32X0-7 M. 



Female individual. Basal cell hardly longer than broad, hyaline; 

 its base slightly broader, contrasting with the deep red-brown base 

 of the perithecium above it; the short deeply suffused stalk-cell, and 

 the minute basal cells of the perithecium hardly distinguishable at 

 maturity: the body of the perithecium pale straw-yellow, short, 

 stout; the inner margin straight or concave; the outer strongly con- 

 vex, tapering from near the middle about equally to the base and apex; 

 the latter broad, flat or somewhat rounded, subtended externally by a 

 reddish brown suffusion, the short tip often slightly bent outward, 

 giving it a snout-like habit. Basal cell 8X8 m- Total length, includ- 

 ing foot (7-11 m), 100-120X30-35 m- 



On the head and tip of abdomen of Ophioglossa sp. Llavallol, No. 

 1500, and Tucuman, No. 1935, (P. Spegazzini). 



A common species at Santa Catalina. 



Amorphomyces rubescens nov. sp. 



Male individiial. Basal cell hj'aline, somewhat longer than broad; 

 subbasal cell red-browm, hardly longer than broad; antheridium 

 relatively large, at least twice as long as the two basal cells combined, 

 exclusive of the foot; the venter shorter than the neck, prominent 

 distally on one side, tinged with red-brown below, slightly inflated; 

 the neck erect, clear reddish straw-color. Total length, including 

 foot, 65 /x. The two basal cells 16-18X6 ju. Antheridium 35-37X9 ijl, 

 the neck 19-20 fx. 



Female individual, relatively slender, the basal cell broader than 

 long, smaller than the foot, hyaline, contrasting. The perithecium 

 tinged throughout with reddish brown, the suffusion deep at and 

 toward the basal and stalk-cells, the latter somewhat shorter than the 

 relatively long narrow basal cells above it. The body of the perithe- 

 cium straight, relatively narrow, subsymmetrically and slightly 

 inflated, the apex broad, slightly rounded, the tip as^'mmetrical or 



