DICTYDf.^lTHALIUM.] KETICULARTACE/K. 157 
Walls of convoluted sporangia perforated and forming a uniform 
tissue of interarching bands. 
(31) Enteridium. 
Fig. Z^.—Enteridium olivaceum Bhrenb. 
a. Plasmodiocarp. Magnified twice. 
h. Part of spurious capillitium. Magnified 35 times. 
c. A spore cluster, and one isolated spore. Mag- 
nified 210 times. 
Fig. 39. 
Walls of convoluted sporangia incomplete, forming tubes and 
folds with numerous anastomosing threads. 
(32) Reticulaeia. 
Fig. 40. — Reticularia Lycoperdon Bull 
a. iEthalium. Natural size. 
h. Fragment of capillitium. 
Magnified 100 times. 
Fig. 40. 
Genus 30.— DICTYDI-ffiTHALIUM Eostafinski, Versuch, p. 5 
(1873). ^thahum flat, formed of erect columnar sporangia; 
sporangium- wall dome-shaped at the apex, continued down to the 
hypothallus in four to six straight threads; capillitium none. 
CLATHROPTYGHI'UM Rost., Mon., p. 225 (1875). 
1. D. plumbeum Rost., I.e., p. 5 (1873). Plasmodium rose-red, 
in rotten wood. .^^Ethalium 1 to 3 cm. broad, 0 5 to 1 mm. thick, 
dull slate- coloured or clay-coloured, iridescent, areolated with the 
convex apices of the sporangia ; sporangia cylindrical, angled by 
mutual pressure, 0*5 to 1 mm. high, 0'2 mm. thick ; sporangium- 
wall persistent and dome-shaped at the apex, subcartilaginous, 
continued down to the hypothallus in four to six straight threads, 
2 to 4 ju, thick, triangular in section ; evanescent between the 
threads. Spores clay-coloured or yellow in mass, when magnified 
pale yellow, spinulose, 9 to 12 diam. — Fuligo plumbea Schum., 
Enum. PI. Saell., ii., p. 193 (1803). Reticularia plumhea Fr., 
Syst. Myc, iii., p. 88, Licea rugulosa Wallr., Comp. PI. Germ., 
iv., p. 345 (1833). Clathroptychium rugulosum Rost., Mon., 
p. 225, App., p. 30 ; Cooke, Myx. Brit., p. 55 ; Blytt, Bidr. K. 
Norg., Sop. iii., p. 9; Macbride, in Bull. Nat. Hist. Iowa, ii., p. 117 ; 
Mass., Mon., p. 51. Licea a2)planata Berk., in Hook,, Journ, Bot. 
