54 ENDOSPOREAE [PHYSARUM 



are the sessile subglobose form of the present species ; in both the 

 lime-knots are partly free, partly united to form an irregular pseudo- 

 columella. 



Hab. On dead leaves, herbaceous stems, etc. — Beds (B.M. 2158) ; 

 Wilts (B.M. 1548) ; Surrey (B.M. 2160) ; near Paris (B.M. 2159) ; 

 Sweden (Herb. Dr. R. E. Fries) ; Germany (Herb. Strassburg) ; Italy 

 (B.M. 573); Cameroons, West Africa (B.M. 2161); Ceylon (B.M. 

 2162). 



14. P. roseum Berk. &Br. in Journ. Linn. Soc.,xiv. 84(1873). 

 Plasmodium maroon-red. Total height 1 mm. Sporangia 

 globose, 0*4 mm. diam., stalked, gregarious, nearly smooth, 

 bright rose-coloured ; sporangium- wall membranous, with 

 included clusters of purple-red lime-granules. Stalk erect, 

 slender, subulate, bright brown, translucent, longitudinally 

 rugose. Columella none. Capillitium a loose network of 

 delicate pale lilac threads, with rather few large irregularly 

 branching purple-red lime-knots. Spores reddish-lilac or 

 reddish-brown, minutely spinulose, 7 to 10 /x diam. — Host. 

 Mon., App. p. 10; Mass. Mon., 294; Petch in Ann. Perad., 

 iv. 331. 



PI. 27. — a. sporangia (Ceylon) ; b. capillitium and spores ; c. spore. 



This species differs from P. pulcherrimum in the large lime-knots 

 and the translucent bright brown stalks. 



Hab. On dead wood.— Ceylon (B.M. 2121) ; Borneo (B.M. 2122) ; 

 Java (B.M. 2120) ; Japan (1993). 



15. P. Newtoni Macbride in Bull. Nat. Hist. Iowa, ii. 

 390 (1893). Plasmodium ? Sporangia shortly stalked or 

 sessile, globose, or flattened and umbilicate above, about 

 0-5 mm. diam., violet-purple, smooth, opaque ; sporangium- 

 wall membranous above, with included deposits of purple 

 lime-granules, rugose and thickened towards the base where 

 it is deep purple and densely charged with calcareous deposits. 

 Stalk strongly wrinkled, purple-brown. Columella none. 

 Capillitium consisting of delicate branching violet threads, 

 with numerous large angular purple lime-knots. Spores 

 dark purple-brown, rough with irregularly scattered warts, 

 8-10 fx diam.— Macbr. N. Am. Slime-Moulds, 37. 



PI. 28. — a. stalked and sessile sporangia ; b. capillitium and spores ; e. spore ; 

 (Colorado). 



The shape of the sporangia and the dark rough spores appear to 

 be the only points which distinguish this rare species from Craterium 

 paraguayense (Spegaz. ) Lister, with which it agrees in colour, in the 

 character of the capillitium, and in the structure of the sporangium- 

 wall. 



Hab. On sticks at an altitude of several thousand feet, Pikes Peak, 

 Colorado (B.M. 1014). 



