230 ENDOSPOREAE [HEMITRICHIA 



90(1794). T. reticulata Pers. I.e. T.venosa Solium. Enum. PL 



Sacll., ii. 207 (1803). Hemiarcyria Serpula Rost. Mon., 266 



(1875). Arcyria Serpula Mass. Mon., 164 (1892). 



PI. 170. — a. plasmodiocarp ; b. spore and spinosc capillitium with fragment of 

 double sporangium-wall (Botanic Gardi-us, Glasgow) ; <•. spore and smooth capillitium 

 (Ceylon). 



This handsome species is widely distributed, and appears to be espe- 

 cially abundant in U.S. America and in the tropics. Mr. Petch writes 

 that it is common in Ceylon, where " the netted plasmodiocarps 

 sometimes extend over an area 4 or 5 cm. long and 2 or 3 cm. broad." 

 A gathering made by him at Hakgala differs from the usual form in 

 the smooth capillitium being marked with five to six close spiral 

 bands, and in the spores being closely reticulated with shallow bands 

 and showing about eighteen meshes to the hemisphere. Where 

 the conditions of development have not been entirely favourable 

 it is not unusual to find the capillitium to consist in part of short free 

 elaters. 



Hab. On dead wood. — In hothouse, Glasgow (Edinburgh Herb.); 

 Fontainbleau, France (B.M. 3007) ; Germany (Strassb. Herb.) ; 

 Poland (Strassb. Herb.); Switzerland (B.M. 3008); Bombay (B.M. 

 797) ; Ceylon (B.M. 802) ; Java (B.M. 3009) ; New Zealand (K. 131) ; 

 Japan (B.M. 2020) ; Kansas (B.M. 3010) ; Iowa (B.M. 832) ; Phila- 

 delphia (B.M. 1901) ; New Hants (B.M. 3011) ; Antigua (B.M. 1684) ; 

 Dominica (B.M. 1754). 



10. H. chrysospora Lister Mycetozoa, 180 (1894). Plasmo- 

 dium ? Sporangia sessile, crowded, or scattered, subglobose, 

 0*5 to 1 mm. diam., or forming bolster-shaped plasmodiocarps, 

 glossy, bright yellow ; sporangium-wall membranous, with 

 minute thickenings forming a broken reticulation. Capillitium 

 a tangle or network of branching yellow threads, 4 to 5 /* 

 diam., marked with four to five narrow bands arranged in a 

 close, regular spiral, and connected by longitudinal striae; 

 the threads with many shortly pointed free ends, often 

 attached to various parts of the sporangium-wall. Spores 

 yellow, reticulated with narrow, sharply defined bands, 

 forming a regular net with six to nine meshes to the hemisphere, 

 14 to 18 /a diam.; border 1*5 to 2/x. broad. — Hemiarcyria 

 chrysospora Lister in Grev., xv. 126 (1887) ; Mass. in 

 Journ. R. Micr. Soc, 1889, 357. Arcyria chrysospora Mass. 

 Mon., 164. 



PI. 169. — a. sporangia ; b. capillitium and spores with fragment of sporangium- 

 wall ; c. capillitium and spore ; (England). 



This species was first found on fallen twigs and moss in a larch 

 plantation near Lyme Regis, November, 1886. It has been found 

 twice since, also in larch plantations, in Dorset and Devon ; in both 

 these gatherings the capillitium consists in part at least of very long 

 free elaters. H. chrysopora appears to be closely allied to the sessile 

 form of Trichia verrucosa. 



Hab. On dead wood, etc. — Beaminster, Dorset (B.M. 3013) ; 

 Charton, Devon (B.M. 3012). 



