240 ENDOSPOREAE [ARCYRIA 



Syst. Nat., 1J79 (1753). Mucor clathroides Scop. Fl. Cam., 

 ed. 2. ii. -493 (1772). M. pyriformis Leers Fl. Herborn, 288 

 (1775). Stemonitis coccinea Roth Fl. Germ., 548 (1788). S. 

 crocea Gmel.- Syst. Nat., 1467 (1791). Embolus crocatus 

 Batsch Elench. Fung., Cont. i. 265, fig. 177 (1786). Trichia 

 denudata Vill. PI. ^Dauph., 1060 (1789). T. granifwmis 

 Hoft'm. Veg. Crypt., i. 3 (1790). T. cinnabarina Bull. Champ., 

 121. t. 502, fig. 1, b, c. (1791). T. purpurea Solium. Enum. 

 PI. Saell., ii. 211 (1803)? Arcyria punicea Pers. in Roemer 

 N. Mag. Bot,, i. 90 (1794) ; Rost. Mon., p. 268 ; Lister 

 Mycetozoa, 188. A. carnea Schum. I.e., 213 ? A. dentata 

 Solium. I.e. ? A. rufa Schum. I.e., 214 *? A. melanocephala 

 Schum. I.e. ? A. conjugata Schum. I.e., 215. A. cincta 

 Schum. I.e. ? A. fusca Fr. Symb. Gast., 17 (1818) ? A. 

 vernicosa Rost. Mon., App. p. 36 (1876). 



PI. 174. — a. sporangia ; b. capillitium threads, showing attachment to cup and 

 spore ; c. spinulose capillitium from another sporangium ; (England). 



This abundant and widely distributed species shows considerable 

 variety in the colour and markings of the capillitium and in the thick- 

 ness of the threads. In some gatherings the threads are stout, dark 

 red, and rough with close-set cogs and spines, in others they are pale 

 pink and the markings consist only of a loose spiral of smooth cogs 

 or half-rings. A long-stalked rose-coloured specimen, gathered by 

 Rev. W. Cran in Antigua (B.M. 1686), shows extremely slender threads 

 2 ii diam. marked only with a spiral of prominent transverse bands 

 1"5 /a in depth ; the capillitium is firmly attached to the shallow cup. 

 Forms of A. denudata occur in which some threads of the capillitium 

 show, beside the usual markings, an irregular reticulation, or an 

 indication of three or four faint spiral bands, suggesting an approach 

 to A. stipata. 



Hub. On dead wood ; common. — Batheaston, Somerset (B.M. 254) ; 

 Lvme Regis, Dorset (B.M. 1506) ; Epping Forest, Essex (B.M. 1505) : 

 Abbev Wood, Kent (B.M. 1 153) ; Highgate, Middlesex (B.M. 1149) ; 

 Yorks (B.M. 1146) ; North Wales (B.M. 3055) ; Aberdeen (B.M. 3056) ; 

 Ireland (B.M. 3057) ; France (B.M. 707) ; Germany (B.M. 708) ; Sweden 

 (B.M. 3058) ; Poland (Strassb. Herb.) ; Switzerland (B.M. 3059) ; Italy 

 (B.M. 705) ; Portugal (B.M. 3060) ; Cameroons, West Africa (B.M. 3061) ; 

 Cape (K. 898) ; Cevlon (B.M. 709b) ; Singapore (B.M. 1938) ; Java 

 (K. 1715) ; Borneo (B.M. 1508) ; New Zealand (B.M. 3062) ; Philippine 

 Islands (B.M. 2033) ; Japan (B.M. 2025) ; Vancouver, B.C. (B.M. 3063) : 

 Toronto (B.M. 3064) ; Iowa (B.M. 1029) ; Kansas (B.M. 3065) ; Phila- 

 delphia (B.M. 1850) ; South Carolina (B.M. 982) ; Antigua (B.M. 1686) ; 

 Dominica (B.M. 1758) ; Cuba (K. 950) ; New Granada (K. 1724) ; French 

 Guiana (Paris Herb.) ; Brazil (K. 899). 



8. A. insignis Kalchbr. & Cooke in Grev., x. 143 (1882). Plas- 

 modium watery-white. Total height 05 to 1*5 mm. Spor- 

 angia stalked, gregarious or clustered in scattered groups, ovoid 

 or cylindrical, 0-3 to 0*4 mm. diam., pale or bright rose-coloured ; 

 cup of sporangium-wall delicately membranous, plaited, 

 nearly smooth or reticulated and spinulose. Stalk thickened 



