438 PROCEEDINGS OP THE AMERICAN ACADEMY. 



outward, a group of about six below the base of the perithecium much 

 longer than the rest and curved outward in a tuft, those arising about the 

 base of the perithecium very elongate, erect, with straight blunt tips, 

 reaching nearly to the apex of the perithecium. 



Perithecia 490-450 X (about) 35 /x. Receptacle 275-430 /«. Total 

 length to tip of perithecium G50-800 ^m. Longest appendages 300-430 ^m. 



On Cryptobium capitatum, Paris Museum, No. 172. Brazil. 



Rhachomyces Cayennensis nov. sp. 



Perithecium rather small, yellowish, the anterior margin nearly 

 straight, the posterior convex ; the tip clearly and abruptly differentiated, 

 concolorous, asymmetrical, somewhat bent. Main axis of the receptacle 

 rather strongly curved, consisting of about twelve cells ; the basal ones 

 slender, deeply suffused, those immediately above opaque slender, the 

 rest rather large with central brown suffusions ; the distal cells paler. 

 Appendages rather coarse, crowded, black brown, opaque or nearly so, the 

 tips mostly bent outward, appressed below, somewhat divergent distally ; 

 six or more about the base of the perithecium slightly longer than the 

 rest, nearly equalling, sometimes slightly exceeding the perithecium in 

 length. Perithecium 120-140 X 25-30 /i. Total length to tip of peri- 

 thecium about 350 |U (average). Longest appendages 140 ^. 



On Cryptobium sp. indet., British Museum No. 387. Cayenne. On 

 the inferior surface of abdomen. 



Rhachomyces stipitatus nov. sp. 



Perithecium pale straw colored becoming tinged with brownish, much 

 darker toward the tip; broadly subfusiform, usually symmetrical, taper- 

 ing from about the middle to the small blunt usually symmetrical, liardly 

 differentiated, often hyaline tip; borne free on a stalk-cell which is con- 

 colorous, sometimes as long as the receptacle, in other cases but slightly 

 developed. Receptacle straw colored, or faintly brownish ; the main 

 axis consisting of about fifteen to seventeen cells, the septa rather oblique, 

 its distal portion, consisting of about two to four cells, erect and free : 

 the cells of the secondary axis relatively large, concolorous, that opposite 

 the subbasal cell of the main axis bearing a long opaque blackish brown 

 appendage curved toward the receptacle and often equalling it in length, 

 other similar appendages arising at intervals above it but not from all 

 the lower cells, becoming more numerous throughout the distal half and 

 in some instances extending to or beyond the tip of the perithecium even 



