334 A Monograph of the Myxogastres. 



umbilicate below, white, sprinkled with minute particles of 

 lime ; stem elongated, slender, equal, straight, pale yellow, longi- 

 tudinally wrinkled, filled with particles of lime, expanding at 

 the base into a minute circular hypothallus ; capillitium rather 

 dense, threads everywhere equal, about 3 /u thick, combined to 

 form a loose, irregular network, nodes very rarely slightly in- 

 crassated, and containing a few minute, colourless granules of 

 lime ; spores globose, dirty lilac, smooth, 10 /ut diameter. 



On wood. Venezuela. 



An apparently very distinct species, remarkable for the almost 

 total absence of thickened nodes or swollen interstitial portions 

 of the capillitium tubes, hence approaching the section Hemi- 

 didymium of Didymium. From 3 3'5 mm. high. 



Tilmadoche oblonga, Host. 



Scattered or gregarious, stipitate ; sporangia cylindrical, obtuse 

 at both ends, apex broadly and deeply umlilicate, tawny-olive, 

 sprinkled with pale particles of lime ; stem elongated, slender, 

 becoming thinner upwards, straight, or usually more or less 

 curved near the apex, reddish or yellow-brown, more or less 

 longitudinally wrinkled, filled with minute particles of lime ; 

 capillitium well developed, threads colourless, thin, with scat- 

 tered, small, interstitial, fusiform swellings containing colourless 

 or yellowish granules of lime, angles of bifurcation not in- 

 crassated ; spores dingy lilac, globose, minutely verruculose, 

 7 9 n diameter. 



Tilmadoche oblonga, Host., Mon. App., p. 13; Sacc., Syll., vii., 

 1, n. 1250. 



Trichamphora oblonga, Berk, and Curtis, Grev., vol. ii., p. 66 ; 

 N. Amer. Fung., n. 360. 



(Type specimen in Herb. Berk., Kew, n. 10,917.) 



Physarella mirabilis, Peck, Bull., Torr. Bot. Club., vol. ix., 

 p. 61, pi. 24, figs. 16 (wretched figures); Rev. Myc., 1882, 

 p. 172, tab. xxix., fig. 5 (after Peck's figures) ; Sacc., Syll., vii., 

 1, n. 1227. 



Exsicc. Ellis, N. Amer. Fung., n. 1212. 



On wood, leaves, &c. United States. 



