ARCTRIA.] ARCYRIACEiE. 193 



Hah. On rotten wood. — Near Cracow, Poland. 

 This description applies to A. ferruginea, 



14. A. Raciborskii Berl., in Sacc. SylL, vii., p. 430. Sporangia 

 stipitate, stalks filled with vesicles ; cup hemispherical, the wall 

 thin, reddish, densely and minutely warted on the inner side ; 

 capillitium forming a loose net, with globose swellings at the 

 nodes and also in the intern odes; threads in the lower part 

 flattened, with one margin dentate, elsewhere smooth ; threads 

 in the upper part subcylindrical, with the teeth arranged in a 

 spiral, the remainder of the thread marked with undulating 

 ridges, forming one to four spirals; becoming in some parts 

 indistinct, or branching to form an irregular reticulation ; spores 

 minutely warted, lO'S to 11'6 /*. diam. — A. decipiens Rac, l.o., 

 p. 84 (non Berk.). 



Hab. Near Cracow, Poland. 



This description applies well to some forms of A. ferruginea. 



15. A. bonariensis Speg., Ann. Soc. Oient. Argent., x., p. 151 

 (1880). Sporangia minute, 0-5 to 0-75 mm. high, 0-25 to 0-3 

 mm. broad, densely crowded in groups of 5 to 20, citron-yellow ; 

 the stalks half the height of the sporangium, concolorous ; 

 capillitium threads arising from the tube of the stalk, cylindrical, 

 3 fj, diam., densely muricate, clear yellow-green j spores globose, 

 granular, 10 /a diam. 



ITab. On an old beam, Bonaria, Argentina. Allied to A. nutcms, 

 but quite distinct. 



16. A. cinnamomea Hazslinszky, in Oester. Bot. Zeitschr., 

 xxvii., p. 84 (1877). Sporangia cinnamon-red, gregarious, at 

 length scattered, cylindrical ; stalks of equal length, transparent, 

 colourless; capilhtium threads forming a network with hexagonal 

 meshes, 3 to 4 /x, diam., beset with small, shortly cylindrical warts; 

 spores cinnamon-red. 



ffab. On wiUow, Hungary. 



This description applies to A. ferruginea. 



17. A. aurantiaca Raunk., in Bot. Tidssk. (1888), p. 61, tab. 3, 

 figs. 4, 9, 10, 11. Sporangia gregarious, ovate or shortly cylindri- 

 cal, stipitate ; stalk the same length as the sporangium, or shorter ; 

 thickenings on the inner side of the receptacle in the form of fine 

 warts; wall, capillitium and spore mass orange- or brick-red; 

 tubes of the capillitium with irregularly connected close-standing 

 ring-like thickenings, 5 to 7 /a broad; spores smooth, 10 to 11 

 /i diam. 



Hah. On rotten wood. — Denmark. 



The above description and figures clearly refer to A. ferruginea. 

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