Ophiotheca. 135 



Physarum vermieularc, Sz., Syn. Fung. Amer., n. 2296. 

 (Specimen from Schweinitz in Herb. Berk., Kew.) 



Perichaena vermicularis, Rost., Mon. App , p. 34; Sacc., Syll., 

 vii., 1, n. 1437. 



Ophiotheca umbrina, B. and C., Grev., vol. ii., p. 68 (1873). 

 (Type in Herb. Berk., Kew.) (Not Perichaena variabilis, Rost., 

 Mon., p. 295 ; Sacc., Syll., n. 1440.) 



Perichaena artocreas, B. and Rav., Grev., v. ii., p. 68 (1873). 

 (Type in Herb. Berk., Kew). 



Perichaena corticalis, Rost., Mon., p. 293 (in part) ; Sacc., Syll., 

 n. 1435 (in part) ; Cke., Myx. Brit., p. 73 (in part). 



Perichaena Friesiana, Rost., Mon., 296 ; Sacc., Syll., n. 1441. 



On rotten wqpd and bark. United States. 



In Schweinitz's specimen there is a clear transition shown 

 from normal perithecia to the venulose, reticulate plasmodiocarp. 

 In the non-venulose form the margin is uniformly raised all 

 round. The threads covered with short raised bands, looking 

 like warts under a low power, and the spores densely covered 

 with depressed warts are very characteristic. 



Ophiotheca anomala, Mass. 



Sporangia scattered or gregarious, sessile, sub-sphaeroid, dingy- 

 ochraceous, rather shining, about 1*5 mm. diameter; threads of 

 the capillitium 4 6 /m thick, cylindrical, ends numerous, truncate, 

 often terminated ~by clavately swollen tips, with crowded raised 

 bands arranged as circles; spores globose, smooth, dingy-ochra- 

 ceous, under the microscope very pale tinge of yellow, 6 7 ^ 

 diameter. 



Corwwvia anomala, Karst., Myc. Fenn., 4, p. 131 ; Sacc., Syll., 

 vii., 1, 1455. 



Trichia anomala, Karst., Not. Sallsk. pro Faun, et Flor. Fenn., 

 ix. (1868), p. 354. 



Ophiotheca serpula, Mass. 



Plasmodium venulose, yellow ; mass of spores and capillitium 

 golden-yellow ; capillitium threads cylindrical, 3'3 //, thick, with 



