ADDITIONAL LIST OF SYNONYMS 263 



flagellate stage, and the plasmodium does not exhibit the characteristic 

 rhythmic circulation of granular protoplasm, but instead shows slow 

 irregular movements. The habit of the plasmodium also is remarkable. 

 Instead of spreading in branching veins, each plasmodium forms a 

 small, nearly stationary mass, that feeds on the lichen or algaelying 

 beneath it, and into which it gradually penetrates. In dry weather 

 each plasmodium contracts to form a spherical rose-coloured macrocyst 

 0-1 to 0-2 mm. diam., and then resembles the peritheciumof a Nectria. 

 The Rev. W. Cran has repeatedly found the macrocysts on lichens and 

 algae growing on elder and ash bark near Aberdeen ; he has lately 

 gathered the mature sporangia also. The macrocysts that he kindly 

 sent us soon revived on being moistened, and formed plasmodia that 

 moved about slowly for some days in a moist chamber. There is no 

 trace of capillitium in the sporangia we have examined, and it seems 

 possible that the threads Zukal described as capillitium may have 

 been the hyphae of some minute mould. 



Hob. On lichens and algae on bark. — Near Aberdeen (B.M. 3198) ; 

 Austria (B.M. 1968a). 



Additional List of Synonyms. 



Aethalium MELAEsruM Chev. in Fung, et Byss. Illustr., fasc. i. (1837) 



no. 32 — Lindbladia effusa Rost. 

 A. rufum Walh. Fl. Crypt. Germ., no. 2097 = Fuligo septica Gmel. 

 A. violaceum Spreng. Syst. Orb. Veg., iv. no. 533 = Fuligo septica 



Gmel. 

 Amphisporittm versicolor Link inMig. Ges. Nat. Fr. Berl., vii. Diss. 



2. \\ = Didymium difforme Duby. 

 Arcyria coccnsrEA Daby Bot. Gall., ii. 857 = ^4. ferruginea Saut. ? 

 A. cylindrica Schum. Enum. PI. Saell., ii. 215 = ^4. denudata Sheldon. 

 A. flexuosa Rabenh. Deutschl. Krypt. FL, no. 2158 = A. Oerstedtii ? 

 A. Lepriettrii Mont, in Ann. Sci. Nat., Bot., ser. 4, iii. 141 = A. cinerea 



Pers. 

 Chondrioderma leptotrichum Racib. in Rozpr. Mat.-Przyr. Acad. 



Krak., xii. 15 = Didymium squamulosum Fr. ? 

 C. Puiggari Speg. in Bot. Acad. Nac. Cienc. Cordoba, xi. 475 (1889) = 



Diderma simplex Lister ? 

 Cionium complanatum Link ex Wallr. Fl. Crypt. Germ., no. 2176 = 



Didymium crustaceum Fr. ? 

 C. farinaceum Link Handb., iii. 410 = Didymium melanospermum 



Macbr. 

 C. floriforme Spreng. Syst. Orb. Veg., iv. 529 = Diderma floriforme 



Pers. 

 C. globosum Spreng. I.e. = Diderma globosum Pers. 

 C. lepidotum Spreng. I.e. = Diderma floriforme Pers. 

 C. lobattxm Spreng. he. = Didymium melanospermum Macbr. 

 C. squajiueosttm Spreng. I.e., 628 = Didymium squamidosum Fr. 

 C. testa cetjm Spreng. I.e., 529 = Diderma testaceum Pers. 



R 2 



