194 ENDOSPOREjE. [LACHNOBOLUS. 



18. A. cornuvioities Racib., in Hedw., xxviii., p. 123 (1889). 

 Sporangia bright cinnamon, obovate on short stalks | mm. high, 

 or almost sessile and globose, 0'5 mm. diarn., frequently confluent 

 into irregular sessile plasmodiocarps, 3 mm. long, ^ mm. high ; 

 wall persistent in the lower part in the stalked forms as a flat 

 cup marked with beautiful net-like thickenings on the inner side; 

 capillitium threads 3 to 8 //, diam., much branched and anasto- 

 mosing with few free ends, with band-like thickenings, either 

 united to form a net, or scalariform, section of threads triangular 

 or flattened ; band-like thickenings not so regular as in A. 

 Jerruginea, much higher, often curved and suddenly disappearing; 

 spores cinnamon in mass, smooth, 6 - 5 to 8 '5 /z diam. The markings 

 of the capillitium show near approach to A . ferruginea and A. 

 inermis, and one might unite all three into a collective species : 

 A. ferruginea has smooth spores 11 to 12 //,, A. inermis Rac. has 

 the spores 10 to 12 /x, minutely warted. 



Hal), On old trunks. Poland. 



SPECIES EXCLUDED FROM THE GENUS. 



A. Bucknalli Mass. = Trichia scabra Eost. 



A. chrysospora Mass. = Hemitrichia chrysospora List. 



A. clavata Mass. = Hemitrichia clavata Host. 



A. decipiens Berk. = HemitricMa clavata Host. 



A. Hariotii Mass. = Lachnobolus circinans Host. 



A. Karstenii Mass. = Hemitrichia Karstenii List. 



A. leiocarpa Mass. = Hemitrichia leiocarpa List. 



A . paradoxa Mass. Hemitrichia Karstenii List. 



A. rubiformis Mass. = Hemitrichia rubiformis List. 



A. Serpula Mass. = Hemitrichia Serpula Host. 



A. stipitata Mass. = Hemitrichia clavata Host. 



A. Wigandii Mass. = Hemitrichia Wigandii List. 



Genus 38. LACHNOBOLUS Fries, Fl. Scan., p. 356 (1835). 

 Sporangia sessile, clustered ; sporangium-wall single, persistent, 

 not thickened with angular granules ; capillitium a loose network 

 of cylindrical threads, with thickenings in the form of closely 

 set warts. 



1. Lachnobolus circinans Fries, Summa Veg. Scand., ii. (1849). 

 Plasmodium ? Sporangia subglobose, sessile, clustered, O5 to O'S 

 mm. diam., ochraceous-brown, shining ; sporangium-wall mem- 

 branous, firm, papillose, ochraceous-yellow. Capillitium a network 

 of freely branching, ochraceous-yellow threads, 2 to 5 /x diam., 

 closely and equally beset with prominent warts ; attached at 

 numerous points to the sporangium -wall. Spores pale yellow, 

 almost smooth, with a few scattered warts, 6 to 8 /JL diam. 

 Host., Mon., p. 282, fig. 186. Arcyria circinans Fr., Stirp. Femsj., 

 p. 83 (1827). Licea incarnata Alb. & Schw., Consp. Fung., p. 

 109 (1805). Lachnobolus incarnatus Schroet., Krypt. Fl. Schles., 

 p. 110 (1885); Blytt, Bidr. K. Norg., Sop. iii. (1892), p. 12; 



