288 THE MYXOMYCETES 



other forms there included. But in the present case, added to the 

 episporic sculpture, we must reckon the peculiar capillitial thread, 

 unlike that seen in either of the chrysospermatous forms, and the 

 gregarious habit without hypothallus. These peculiarities seemed to 

 Dr. Rex distinctive, and as they appear constant they may be left to 

 separate the species. 



In the English monograph this species is included in T. aijinis 

 de By. The spores are different, however, and the capillitium more 

 slender. It needs further study, pending which it may be allowed to 

 stand. 



Pennsylvania. 



12. Trichia affinis de Bary 



in Fuckel, Symb. Myc. 336. 1869. 



1889. Trichia intermedia Massee, Jour. R. Micr. Soc. 341. 

 1889. Trichia kalbreyeri Massee, Jour. R. Micr. Soc. 344. 



Sporangia globose or obovoid, sessile, usually crowded, often seated 

 on a membranous hypothallus, 0.6-1 mm. in diameter, ochraceous or 

 shining golden yellow; wall membranous, pale yellow, marked with 

 delicate striae; capillitium of long, cylindrical elaters, 4-6 fx wide, with 

 conical pointed ends, smooth or minutely spinulose, and with longi- 

 tudinal striae; spores reticulated with broad pitted bands, forming 

 three to five meshes to the hemisphere, 13-15 /*. Plasmodium watery 

 white. 



Mr. Lister thought T. pulchella Rex a synonym. This seems doubt- 

 ful. Hemitrichia helvetica Meylan (Bull. Soc. Vaud. Sc. Nat. 46 : 54, 

 1910) is regarded by Miss Lister as an imperfect development of this 

 species, with a more or less netted capillitium. 



Ontario, Montana, Colombia, Bolivia; temperate regions of the 

 old world; Ceylon, Philippines. 



13. Trichia persimilis Karst. 



Not. Saellsk. Fenn. Forh. 9 : 353. 1868. 

 PI. XIX, Figs. 510, 511. 



1875. Trichia jackii Rost., Mon. 258. 



1877. Trichia abrupta Cooke, Ann. Lye. Nat. Hist. N. Y. 11 : 404. 



1879. Trichia proximella Karst., Bidr. Kann. Finl. Nat. Folk 34 : 139. 



1889. Trichia balfouri Massee, Jour. R. Micr. Soc. 339. 



1889. Trichia sulphur ea Massee, Jour. R. Micr. Soc. 339. 



Sporangia globose, obovoid or clavate or irregularly spherical, 

 0.5-0.8 mm. in diameter, shining, golden yellow to tawny, anon iri- 

 descent with metallic luster, sessile; hypothallus thin, but usually 



