BADHAMIA.] PHYSARACE.E. 35 



shape densely charged with lime-grannies, often confluent in the 

 centre, forming a pseudocoltunella. Spores dark purple-brown, 

 rough or reticulated with prominent and confluent warts, 10 to 

 15 /x diarn.^Rost., Mon., p. 145, figs. 108, 109 (1875); Cooke, 

 Myx. Brit., p. 27. Physarum lilacinum Fr., Syst. Myc., iii., 

 p. 141 (1829). Craterium lilacinum Mass., Mon., p. 271. Diderma 

 concinnum Berk. & Curt., in Grev.. ii. (1873), p. 52. Physarum 

 concinnum Mass.. Mon., p. 308. 



Plate V., A. a. sporangia, x 20 (England) ; b. capillitium and spores 

 of the same, x 280 ; c. spore, x (300 ; d. sporangium, showing a pseudo- 

 columella, x 20 (Mecklenburg-Schwerin). 



The type of Diderma eoncinnum Berk. & Curt., in the Kew Herb., is 

 a pale whitish form of this species with the characteristic spores and 

 capillitium. 



Hal). On Spliayinun, twigs, etc., in marshy ground. Pilmoor, Yorks 

 (L:B.M.9) ; Scotland (Edin. Herb ) ; Germany (B. M. 488, and Strassb. 

 Herb.) ; Philadelphia (L:B.M.'J). 



9. B. rubiginosa Eost., Mon., App., p. 5, fig. 115 (1876). 

 Plasmodium I Sporangia obovoid stalked, 0'5 mm. broad, rufous, 

 or purplish-brown, the upper part usually paler and breaking up 

 in fragments ; sporangium-wall purplish, membranous, more 

 or less charged with granules of lime. Stalk cylindrical or 

 widening at the base, usually about the length of the sporangium, 

 smooth, purplish-brown, continued within the sporangium to more 

 than half its height as a columella. Capillitium white or pale 

 rufous, a rugged network usually densely charged with lime- 

 graiiules, spreading from all parts of the columella to the 

 sporangium-wall. Spores dark purplish-brown, minutely spinu- 

 lose or verrucose, or reticulated with prominent and confluent 

 warts, 11 to 15 //, diam. Cooke. Myx. Brit., p. 82; Mac-bride 

 in Bull. Nat. Hist. Iowa, ii., p. 159. Physarum rubiyinosum 

 Chev., Fl. Par., p. 338 (1826). Scyphium rubiyinosum Rost., 

 Mon., p. 148. Craterium rubiyinosuui Mass., Mon., p. 270. 

 Didymium Curtisii Berk., in Grev., ii. (1873), p. 65. Badhamia 

 Curtisii Rost., Mon., App., p. 5. Craterium Curtisii Mass., 

 Mon., p. 272. Craterium obovatum Peck, in Rep. New York 

 Mus., xxvi., p. 75. 



a. genuina : spores minutely spinulose. 



j3. dictyospora : spores strongly warted or reticulated. Bad- 

 hamia dictyospora Rost., Mon., App., p. 4 ; Cooke, Myx. Brit., 

 p. 82. Craterium dictyospermum Mass., Mon., p. 270. 



Plate V., B. a. sporangia, x 20 (England) ; b. broken sporangium from 

 a mounting in glycerine jelly, showing columella surrounded by capillitium, 

 and the mottled sporangium- wall, x 50 ; <?. capillitium and spores, x 280 ; 

 d. spore of the same, x 600 ; e. spore, x 600 (Deer Island, St. Lawrence) ; 

 /. spore, x 600 (New Jersey); g. spore, x 600 (Appin, Scotland: Eosta- 

 finskrs type of his B. dicti/oajwrti). 



Didymium Curtisii Berk, differs from the type of B. rubiginoxa only 

 in being sessile or shortly stalked ; in both British and American 



