88 A Monograph of the Myxogastres. 



regularly arranged and corresponding to the apices of the 

 component sporangia; columella (stylidia) brown, slender, 

 capillary, aggregated, but for the most part individually free ; 

 capillitium loosely interwoVen into a common mass; mass of 

 spores brown. 



Stcmonitis Tubnlina, Alb. and Schu. Consp., p. 102. 



On decorticated pines. Germany. 



From the description given by Albertini and Schweinitz, I 

 have very little doubt but that the organism they had in view 

 was Siphoptychium Casparyi, Rost. 



In Saccardo's Sylloge, vii., p. 399, the following synonyms and 

 remarks are given. 



Stcmonitis fusca, var. /3 Fr. Syst. Myc., iii. ; Amaurochaete 

 speciosa, Zukal, Eni. Pilze Myx. Bact., p. 5, t. 15, f. 3. 



According to Raciborski, Hedw. 1887, p. 3, the above species 

 is neither a species of Stemonitis nor Amaurochaete, but a new 

 genus described under the name of Juudzillia, Racib. 



SlPHOPTYCHIUM, Rost. 



Sporangia sessile, densely crowded, springing from a well- 

 developed hypothallus, cylindrical, or prismatic from mutual 

 pressure, the whole forming a naked aethalium ; wall of spor- 

 angium single, thin; columella central, springing from the 

 hypothallus and reaching to the apex of the sporangium, tubes 

 of capillitium rather scanty, radiating from the columella to the 

 wall of the sporangium. 



Siphoptychiwn, Rost., Mon., App., p. 32; Cke., Myx. Brit., 

 p. 83 ; Sacc., Syll., vol. vii., part I., p. 417. 



The general habit and appearance of some species of Tululina 

 from which the present genus differs in the presence of a 

 central columella and capillitium; yet the general structure 

 and arrangement of the sporangia and the spore sculpture of 

 the only known species is so thoroughly that of Tulmlina 

 cylindrica, that it seems very probable that the present genus 

 is an evolution from the last-named species, or some close ally, 

 the columella and radiating tubes being derived from modified 

 sporangial walls. 



