36 A Monograph of the Myocogastres. 



but must constitute a new genus, which exactly illustrates 

 the difference between Licea and Lindbladia or Tubulina 

 respectively ; whereas the only distinction given by Rostafinski 

 between Tubulina and Lindbladia amounts to saying that in the 

 former the sporangia are elongated ; in the latter, shorter. 



A well-defined hypothallus is often present, and in some 

 species, as T. stipitata, B. and C., forms an elongated, stem-like 

 structure which possibly consists of sterile, modified sporangia. 



Dr. Geo. A. Rex has kindly furnished me with a sequence of 

 specimens, all belonging to Tubulina cylindrica as defi ried in the 

 present work, which to my mind show clearly the transition 

 from Tululina to Siphoptychium, and thus furnishing a connect- 

 ing link between the Peritricheae and the Columelliferae. 



Distrib. Europe; North America; India; Ceylon; Australia; 

 Bonin Island: species, 11. 



A. Sporangia, regular or plasmodlocarp. 

 Tubulina minima, Mass. 



Sporangia scattered, sessile on a broad base, hemispherical or 

 variously elongated, little depressed ; wall thin, smooth ; from clear 

 to obscure brown ; torn above into several persistent, irregular teeth ; 

 mass of spores umber, spores globose, minutely warted, 10 12 /x 

 diameter. 



Licea minima, Fr., Syst. Myc., iii. p. 199 ; Karst., Myc. Fenn., 

 iv. p. 125 ; Sacc., Syll., 1385. 



Licea varialilis, Schrad., Nov. pi. gen., p. 15, t. vi., ff. 5, 6. 



Hxsicc. Karst., Fung. Fenn., 798. 



(Specimen from Fries in Herb. Berk.) 



Britain (Bulmer, Yorks). 



On pine wood and sawdust. Germany ; Sweden ; Finland. 



An obscure species, which, from its scattered habit, is easily 

 overlooked; when circular from '5 1 mm. across; frequently 

 2 3 mm. when elongated. The colour varies from almost chest- 

 nut to blackish brown ; ruptured above in an irregularly stellate 

 manner. 



The inner surface of wall of sporangium has numerous 

 coloured cells or masses arranged in groups. 



