214 A Monograph of the Myxogastres. 



Physat'um caesium, Fr,, S. M., iii., 147 (1829). 



Physaimm alhnm, Fr., S. M., iii., 147 (1820); LetelL, t. 710, 



f. 4; Cooke, Hdbk., No. 1140. 

 Didymium difforme, Duby, Bot. Gall., ii., 858 (1830). 

 Didcrma nitcns, Klotzsch, in Hook. Herb.; Eng. FL, v., 



p. 312; Cooke, Hdbk., 1113. 

 Didcrma Ncesii, Corda, Ic, ii., f. 58 (1838). 

 Leocarpus cyanesccns, Fr., S. V. S., 450 (1849). 

 Zeocarpics mtem, Fr., S. V. S., 450 (1849). 

 Didcrma Lihcrtianum, Fres., Beit., t. iv., f. 16 — 27 (1850). 

 Didymium Lihcrtianum, De Bary, Mycetozoa (1864). 



Chondrioderma Berkeleyanum, Rost. 



Sporangia slightly scutcllate, snow-white, stipitate ; stem rigid, 

 hay at the hase, hecoming jJaler upivards; threads of capillitium 

 slender, anastomosing to form a net ; spores dingy violet, strongly 

 vxcrtcd, 10 — 11 II diameter. 



Chondrioderma Bcrkelcyanum, Rost., Mon. App., p. 16 ; Sacc, 

 Syll., no. 1258. 



Island of Tahiti. 



There is no specimen in the Berkeleyan Herbarium answer- 

 ing to the above description, and in the " Introduction to 

 Cryptogamic Botany," p. 335, the spores are described and 

 figured with a reticulate epispore. 



(Rostafinski's Synonym.) 

 Tricha7iiphora ]iczizoidcs, Berk., Intr. Cr. Bot., p. 335, non 

 Jungh. 



Chondrioderma physarioides, Rost. (figs. 59 — 62). 



Gregarious, sessile on a broad base, circular or irregularly 

 elongated, depressed, outer cretaceous wall polished, pure white 

 or ivory tinted, inner wall dirty ochraccons, sometimes separated 

 from the outer wall by a space containing air ; columella ohsoletc ; 

 threads of capillitium equal, about 3 jw thick, colourless, some- 

 times rough in parts with minute particles of lime, hranchi^ig 



