The Myxomyceles of the United States. 405 



132. Triciita rexiformis Peck, N. Y. Reports. 

 On bark of Acer. N. York (Peck). 



Genus 35. Hemiarcyria R. 

 133. Hemiarcyria rubiformis (Pers.). 



Trichia rubiformis Pers., Disp.. t. 1, f. 3. Schw., Am. Bor., 2321. 

 Trirhia Necniana Cord a, Ic, i, 288G. 

 Trichia pyriformis Hoffm., V. Cry., t. i, f. 1. 



Spores -01— -0H rara . 

 On rotten wood and moss. Car. (Schw., Curt.); Bethlehem (Schw.); 

 Canada (Dickie); Boston (Farlow) ; N. York (Peck). 



134. Hemiarcyria clavata (Pers.). 



Trirhia elavata Pers., Disp., p. 11. Schw., Am. Bor., 2324. 

 Trichia obtusa Wigand, t. 11, f. 4. 



Spores -O0S— •000""". 

 Car. (Schw., Curt.) ; Penn. (Schw.) ; Boston (Farlow) ; Conn. (Wright) ; 

 N. York (Peck). 



135. Hemiarcyria leiocarpa Cooke. 



Hemiarcyria pallidula Cooke in litt. 



Sporangia simple, obovate or pyriform, rarely almost globose, pallid, 

 with a stem of the same color, as long as the diameter of the sporangia. 

 Mass of spores and capillitium concolorous, or with a slight ochraceous 

 tint. Capillitium sparse, forming a loo«e net. Tubes branched in a retic- 

 ulate manner. Spirals three, thin, prominent along the convex side of 

 the tubes, mixed with a few short obtuse spines. Spores ^bose, with a 

 thin membrane, -0125 — ■014 mm . Cooke, Brit. Myx., fig. 252, 255. 



On decayed vegetable debris. Portland, Maine (Bolles). 



Many of the threads are attached to the inner wall of the 



sporangium, after the maimer of Arcyria, short, few in 



number, and thin-walled, differing in this feature from H. 

 clavata in a marked manner. 



136. Hemiarcyria serpula (Scop.). 



Trichia reticulata Pers., Disp., 10. Schw., Am. Bor., 2332. 

 Trichia serpula Pers., Disp., 10. Schw., Am. Bor., 2331. 

 Car. (Schw., Curt.); Bethlehem (Schw.); N. York (Peck). 



