MYCETOZOA de Bary. 
Subclass I.— EXOSPOEE^. Spores developed outside the 
sporophores. 
Order I. CERATiOMYXACEiE. Sporophores membranous, 
branched; spores white, borne singly on filiform stalks rising 
from the areolated sporophore. 
Genus 1.— CERATIOMYXA Schroeter, in Engl, and Prantl, 
Nat. Pflanzenfam., i., 1, p. 16 (1889). Sporophores consisting 
of membranous processes, either simple branches from a common 
base, or forked, or forming a network. The periphery is mapped 
out into polyhedral areolae, from the centre of each of which arises 
a slender stalk bearing a single elhpsoid colour- 
less spore. — Ceratium Alb. & Schw., Consp. 
Eung., p. 358 (1805) non Schrank (1793). ' ' ' 
Fig, 9. — Ceratiomyxa mucida Schxoet. 
a. Clusters of sporophores. Twice natural size. 
i. Sporophore. Magnified. 40 times. 
c. Four areolae of mature sporophore : one spore 
still attached to its stalk, and another free. 
Magnified 480 times. 
1. C. mucida Schroet., I.e. Plasmodium colourless. Sporo- 
phores white or pinkish-yellow, membranous, either rising from 
a common hypothallus in a tuft of simple or forked, fasciculate 
obtuse branches, 1 mm. or more high, '07 mm, thick, or more or 
less interwoven in broad perforated bands, from which arise 
irregular and anastomosing lobes ; the membranous wall is divided, 
chiefly on the upper part of the sporophore, into somewhat 
hexagonal areolae about 10 /x, broad; a membranous stalk bearing 
the spore arises from the centre of each areola. Spores white 
smooth ovoid, 10 X 6 to 13 x 7 ix. — Mac bride, in Bull, Nat. Hist, 
Iowa, ii,, p, 114, Isaria mucida Pers,, in Kbmer, N, Mag, Bot., 
i., p. 121 (1794). Ceratium hydnoicles Alb. & Schw., Consp. Pung., 
p, 358, Fr., Syst. Myc, iii., p. 294; Fam. & Wor,, in Mem. 
Acad. Imp, Petersb, (1873), Ser. 7, xx., p. 4; Zopf, Pilzthiere, 
pp. 64, 174; de Bary, Comp. Morph. Fungi (1887), p. 432; Eng. 
Fl., v,, p. 329 ; Cooke, Brit, Fungi, ii,, p. 550. Ceratium pyxi- 
datum Alb, & Schw,, I.e., p, 359. , Ceratium arbuscula Berk. & Br., 
in Journ. Linn, Soc, xiv,, p. 97. 
