Central American Pyrexomycetes. 407 



H. POLYSPERMUM Mont. 



Collected several times on bark of dead limbs and trees. 

 Ometepe. (B. S. & C. L. S.) Castillo Viejo. (C. L. S.) 



H. CALLOSTROMA iyScJrjj.') Bcvh. 

 On the fire-wood of a steamboat, near Castillo Viejo. (B. S.) 



H. FOSSULATUM Mout . ? 



Erumpent, long and widely effused. Stroma carbonaceous, 

 applanate, sub-undulate, black -fuscous, pitted. Perithecia 

 oblong-ovoid, concolorous, with a little prominently punctiform 

 and central ostiolum in each pit which is at hrst white-prui- 

 nose, finally nude. 



On the bark of trees, Cavenne (Leprieur). [Sacc. Syll. I, 

 p. 380.] 



The specimens agree with the description of H./ossuIatmn 

 Mont., and tolerably with specimens of that species from the 

 Orinoco river, onh'the perithecia are more scattered. — (Ellis.) 



On bark of rotten stick, Castillo Mejo. (C. L. S.) 



H. CYLINDROPHORUM E. d' E. n. Sp. 



Stroma pulvinate, elliptical, 2x1 cm. or by confluence larger 

 and more irregular, consisting of a thin (i mm.), carbona- 

 ceous, rusty black, superficial layer covering the cylindrical, 

 flesh-colored, 3-4 mm. long, carbonaceo-membranaceous peri- 

 thecia, and shghtly roughened by the conic-papilliform, sub- 

 umbilicate ostiola. The perithecia extends down to the wood. 

 Asci cyHndrical, p. sp. 22-25x3,", or including the slender 

 stipe 35-40 ,u long, paraphvsate, S-spored. Sporidia uniseri- 

 ate, often oblique, oblong-elliptical, pale brown, 3-3}^ X2u. 



When the stroma is broken in two, the elongated perithecia 

 remind one of the peridia of Tiihulina. 



On dry, hard wood, Ometepe. (C. L. S.) 



H. NICARAGUENSE E. & E. n. Sp. 



Stroma discoid, 2-3 cm. dia., convex, reddish-purple, becom- 



