264 THE NORTH AMERICAN SLIME-MOULDS 



7. Hemitrichia ixtorta List. 



1891. Hemiarcyria intorta Lister, Jour. Bot., p. 268. 

 1891. Hemiarcyria longifila Rex, Proc. Phil Acad., p. 396. 

 1894, Hemitrichia intorta List., Mycetozoa, p. 176. 



Sporangia gregarious, globose-turbinate or pyriform, golden-yellow, 

 stipitate ; peridium thin, translucent, shining, opening at the summit 

 irregularly, leaving a funnel-shaped receptacle below; stipe dark red 

 brown, solid, rugulose ; capillitium of threads sparingly branched, but 

 looped and doubled upon themselves and constantly intertwisted, or- 

 ange-yellow, 3—4 fi in diameter, with spirals four, sparingly spinu- 

 lose, even and regular, the longitudinal striae conspicuous; spores in 

 mass concolorous, under the lens yellow, delicately warted, globose, 

 9-10 IX. 



Concerning this species, Dr. Rex says: "Externally this species 

 resembles H. clavata Pers., and has probably often been mistaken 

 for it. The capillitium, however, in its structural details and habit 

 of growth, is widely different. The partial untwisting of the loops 

 of the capillitium by drying, after the rupture of the sporangium, 

 causes it to be projected and elongated sometimes two or three times 

 the length of the sporangium." Outwardly the open sporangium, by 

 the projecting free tips, reminds one of a trichia. The capillitium is 

 like that of H. vesparium, but less rough, and, of course, different 

 in color. 



Rare. Fairmount Park, Philadelphia; Ohio, Iowa. 



8. Hemitrichia clavata (Pers.) Rost. 



Plate IIL, Figs. 1, 1 b. 



1794. Trichia clavata Pers., R'6m. N. Bot. Mag., L, p. 90. 



1873. Hemitrichia clavata Pers., Rost., Versuch, p. 14. 



1875. Hemiarcyria clavata (Pers.) Rost, Mon., p. 264. 



1893. Hemiarcyria ablata Morg., Jour. Cin. Soc, p. 30. 



1893. Hemiarcyria funalis Morg., Jour Cin. Soc, p. 32. 



Sporangia clavate or turbinate, gregarious, scattered or crowded, 

 yellow, olivaceous or brownish, stipitate; the peridium generally thin, 

 evanescent above, breaking away so as to leave a more or less definite 

 cup beneath; stipe about one-half the total height, reddish, reddish- 

 brown, or blackish, hollow about half-way down; capillitium various. 



