TYLOSTOMA MONTANUM (Plate 77). Pileus dark reddish 

 brown, large. Cortex dark, usually persistent on lower portion of 

 peridium. Mouth small, tubular, round. Stem dark colored, obese, with 

 a dark cortex forming large scales. Capillitium hyaline, of slender 

 threads, rounded and swollen at the septa. Spores 5-6 mic., aculeate. 



This plant was described by Prof. Patouillard from specimens col- 

 lected by himself in the higher altitudes of Tunis. It seems to me 

 to be a large edition of Tylostoma squamosum of Europe, quite dis- 

 tinct in its large size and obese stem. 



(Tylostoma Bresadolae, recently described from Italy, evidently belongs to 

 this group.) 



Group 4. 



TYLOSTOMA ALBICAXS (Plate 77). Peridium uncolored. 

 dirty white, with a small, tubular, circular, protruding mouth. Cortex 

 adherent, separating imperfectly, particles adhering to the peridium. 

 at the base of the peridium thickened and subpersistent. Stem pale or 

 slightly colored, rough, striate but not scaly. Internally white, with 

 central fibrils. Capillitium hyaline, slightly swollen at the joints, with 

 a plane septum. Spores 5-6 mic., slightly asperate. 



The prominent features are the uncolored peridium, the tubular 

 mouth, the partly adherent cortex. The plant is never "smooth" and 

 does not seem to us to be well described or figured by Miss White. 

 However,, we are assured from our study of the type specimens and 

 the photographs we have made of them that it is the same plant that 

 reaches us from Texas and hence use the name. We have received 

 Australian specimens from J. G. (). Tepper that we can not separate 

 from the Texan species. 



SPECIMENS ix OUR COLLECTION. 



Texas, W. H. Long, four collections, also one collection with spores slightly 

 larger, 6-7 mic. 



TYLOSTOMA LONGIL This plant has all the general characters of the 

 previous and from an exterior examination we can not tell them apart. The 

 spores, however, are very small, from 2y 2 -?> mic. Those who place much stress 

 on microscopic characters will see in it a strong species. For us it is only a form. 



SPECIMENS IN OTR COLLECTION. 

 Texas, W. H. Long (six collections). 



TYLOSTOMA McALPIXIAXUM (Plate 78). Peridium nn- 

 colorcd, with a circular, tubular, slightly protruding mouth. Cortex 

 thick, subpersistent at the base of the peridium. Stem (relatively) 

 thick, pale, slightly scaly. Capillitium hyaline with a very few swollen 

 septa. Spores 5-6 mic., almost smooth. 



15 



