Tululina. 39 



Tubulina guaranitica, Koumeg. 



Gregarious ; sporangia globose, sometimes slightly attenuated 

 below on passing into the stem ; wall single, thin ; dingy 

 ochraceous with a tinge of olive, sometimes greyish below, 

 about 1 mm. diameter; stem rather thick, slightly incrassated 

 doivmvards, and passing into a hypothallus, 1'5 2 mm. long, 

 ochraceous-brown ; mass of spores umber ; spores globose, smooth, 

 7 8 fj. diameter. 



Tubulina guaranitica, Roumeguere, Fung. Sel. exsicc., no. 5196. 



Licea ? guaranitica, Speg., Fung, guaran., Pug. I, no. 322. 



On decayed bark. Guarapi ; Argentine Republic. 



With the general appearance of a small specimen of Tubulina 

 stipitata, differing in having only a single sporangium, or 

 aethalium surrounded by a thin, friable cortex. The dimorphic 

 capillitium described by Spegazzini as consisting of septate 

 threads is clearly nothing more than the mycelium of some 

 minute fungus spreading in the mass of spores. The tail-like 

 appendages to the spores mentioned by the author are to be 

 explained in the same way. The above description is drawn 

 up from the specimens in Roumeguere' s exsicc. These speci- 

 mens were supplied by Balansa, and may therefore be con- 

 sidered as authentic, inasmuch as Spegazzini's Fungi guaranitica 

 is an account of the Fungi collected by Balansa. 



B. Aethalium naked. 

 Tubulina cylindrica, Rost. (f. 1 6). 



Sporangia usually crowded and forming a naked cake-like 

 brown aethalium, rarely scattered, seated on a well-developed 

 flat or slightly convex hypothallus, cylindrical or subangular 

 from mutual pressure, more or less elongated, apex rounded ; 

 wall single, thin, often iridescent; mass of spores brownish- 

 umber; spores globose, about three-foiwtlis of the surface with 

 a regular, Jine-meshed network, the remainder with scattered 

 ridges and warts, 7 9 /u, diameter. Rost., Mon., p. 220 ; 

 Cke., Myx. Brit,, p. 54; Sacc., Syll., 1391; Schroeter, p. 102. 



