MYCETOZOA de Bary. 



Subclass I. EXOSPORE^]. Spores developed outside the 

 sporophores. 



Order I. CERATIOMYXACE.E. 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 areolse, from the centre of each of which arises 

 a slender stalk bearing a single ellipsoid colour- 

 less spore. Ceratium Alb. & Schw., Consp. a ~ 

 Fung., p. 358 (1805) non Schrank (1793). 



Fig. 9. Ceratiomyxa mucida Schroet. 



a. Clusters of sporophores. Twice natural size. 



b. Sporophore. Magnified 40 times. 



c. Four areolas of mature sporophore : one spore 



still attached to its stalk, and another free. 



Magnified 480 times. 



Fig. 9. 



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 areolee 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 /x, Macbride, in Bull. Nat. Hist. 

 Iowa, ii., p. 114. Isaria mucida Pers., in Homer, N. Mag. Bot., 

 i., p. 121 (1794). Ceratium hydnoides Alb. & Schw., Consp. Fung., 

 p. 358. Fr., Syst. Myc., in., 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. 



