356 Transactions of the Society. 



obsolete ; spores elliptico-glohose, pa2nUoso-scahrid, 10-12 x 10 ^u, 

 yellow. 



Berlese in Sacc, Syll., n. 1520. 



Hemitrichia melanojpeziza, Spegazzini, Fung. Arg., Pug. iv. n. 

 268. 



On bark. Brazil. Looking exactly like some black Peziza. 



Hemiarcyria calyculata, Speg. 



Sporangia simple, gregarious, stipitate, globose or elliptical, dirty 

 foxy-brown, 1-2 mm. diameter, stem 3-5 mm. long, 200-250 fx thick, 

 round, glabrous, rather tough, apex dilated into a little dimidiate 

 cup equal to the peridium, base dilated, Jibrillose, colour of the 

 sporangium ; spores and capillitium dingy yellowish-fulvous ; elaters 

 7-8 fJL thick, cylindrical, yellowish, sparsely branched, free tips acute ; 

 spirals 3-5, flat, not very conspicuous, separated by interspaces their 

 own width, spinulose ; spores discoideo-lenticular, concavo-convex, 

 margin muriculate, 10 X 3 /x. Spegazzini, Fung. Argent., Pug. iii. 

 n. 92; Sacc, Syll., 1518. 



On rotten willow trunk. Argentine Eepublic. 



A most remarkable species if the spores as described above are the 

 normal condition. Many species of Myxogastres have the spores 

 concavo-convex when dry, and it is more than probable that the spores 

 in the above species had not been soaked sufficiently long before 

 examination. 



Hemiarcyria Wigandii, Rost. 



Sporangia clavate, discoid, or irregularly subrotund. very small, 

 almost sessile ; mass of spores and capillitium hay or Jiesh-colour 

 verging on yellow ; elaters rarely branching, spirals one or two, 

 flexuous, either separated hy interspaces from three to four times their 

 own width or crowded and almost forming rings, tips scarcely 

 narrowed, truncate or inflated; spores minutely verruculose, 10-11 ix 



nifllTlPTPT* 



Eosi, Mon., p. 267, fig. 232; Sacc, Syll., 1517; Cooke, Myx. 

 Prit., fig. 232. 

 Germany. 



(Eostafinski's Synonym.) 

 Trichia ahietina, Wgd., 1. c, p. 33, t. ii. f. 11 (1863). 



* Hemiarcyria paradoxa, Mass. (n. sp.) fig. 35. 



Sporangia scattered or aggregated, sessile on a broad base, hemi- 

 spherical or irregularly elongated and subvermiform, smooth, rather 

 shining, dirty ochre, inner surface of the wall with a thick layer of 

 amorplious particles of lime; mass of capillitium and spores pale 

 lemon-yellow ; capillitium scanty, threads 4-5 /x thick, much contorted 

 and forming a loose net, with but few abrupt free tips, spirals very 



